God bless Smule. I panned their Ocarina app way back, but since then they've pushed right along without me, releasing idea after idea on Apple's App Store. And I think that, though the Leaf Trombone didn't really capture my attention, this one might finally be the big winner in my book: they've released I am T-Pain, an app that will automatically Auto-tune you into the style of some of the rapper's top songs, with more purchaseable within the app. There's even a "freestyle" mode, complete with a few unreleased background tracks to jam with -- as you can see above, all you do is talk into the iPhone's mic, and you can autotune the news or whatever else you want. Shawwwwty!

Silly? Maybe, but they're going to sell a million of these, and given that Smule's apps tend to be easy to pick up and fun to play with, even people who aren't familiar with T-Pain's work will probably get the app just to sing a few bars to see what it sounds like (you can also send those messages off to Facebook or email as well). And Smule is moving right up into the iPhone 3.0 era: the app comes with four songs, and there are four more available to purchase in-app, along with even more (and more popular: Kanye's "Good Life" and the Lonely Island's "On a Boat" track are due out soon) songs coming, complete with lyrics and auto-tune settings and timings in the future.

Maybe you're laughing. Maybe you think this is dumb, and you've already had enough of auto-tune on pop radio, and don't really want it in your iPhone, too. But trust me on this one: Smule is a company that's made silly music experiences on the iPhone extremely popular, and having T-Pain's tunes and auto-tuning abilities (officially from the company behind the pro version, too) available in this app is going to make it big, no question. The app's available right now for $2.99, so pick it up if you're feeling the beat and want to sing, even if you can't. Yeahhh-eeeyeaahh-yeah.

I've been down on the fine folks at Smule in the past -- I've said that their app Ocarina seems kind of silly (even if people have created some pretty awesome stuff with it and other less annoying music apps). And about the only thing they could have done to make it up to me was to develop some sort of super massively multiplayer music app, some app in which you could play a tune and have it sent all around the world. So I guess I have to call off my pretend grudge against them once and for all, because that's exactly what they did: Leaf Trombone: World Stage is in the App Store right now.

This is, of course, the app with the strange name that we saw at Apple's iPhone 3.0 demo. It features a Chinese leaf-type instrument that sounds, as you can hear above, like a trombone. But the World Stage part is the most interesting -- Smule has set up a way to share the songs you play in the app with people around the world, and the people who hear your work can send back short messages and emotes to say how they felt. It's an interesting idea -- kind of combines what they were trying to do with Zephyr into a more Ocarina-like app.

At just 99 cents, there will undoubtedly be lots of musicians out there picking it up. And while the video above is... cute... we're sure there'll be some even better stuff to listen to soon.

There's money in them thar App Store! Smule, the company behind the popular Ocarina and Zephyr apps for the iPhone, has informed us that they raised a whopping $3.9 million from a round of venture funding led by a firm named Granite Ventures. That's a lot of capital -- while a lot of people are aiming to get their hands in the cookie jar in a big way in the burgeoning economy of the App Store, $3.9 million is the biggest single payout we've seen yet (the iFund actually paid out $100 million, but that was split among various companies and people, and we haven't heard specifics on exactly what they got).

The company brags that they've attracted over one million users already, and that they will use the funding to "help people experience music as it's never been experienced before and in turn find new ways of bringing people together." We can't help but wish them well -- hopefully we'll see more high quality apps in the App Store, and hopefully that'll pay off for both investors and consumers.

It's probably time for me to lay off of Smule -- I've said that their Ocarina app might be the silliest musical app in the App Store, but we have a new winner: Cat Piano is just plain loony: a piano made up of cats meowing, like those old Christmas recordings, but playable. There are a few different cat sounds to play (from "Furball" to "Housecat"), and even a regular piano if you just want to tickle the ivories a little bit. Most of the reviews on the App Store say people are using it to mess with their cats, but there's definitely a musical instrument here -- if Ocarina can be used as an instrument, the Cat Piano can, too.

And in fact, the developers are challenging you to prove it -- they're giving away a Nintendo DS (interesting choice of prizes -- an iPod touch might be more apt) to the person who makes the best video using Cat Piano. I don't know if you could beat that Jingle Cats video, but you can certainly try. The contest starts on Thursday, and goes until March 20th, so you've got a little over a month to get the cat sounds down.

Ocarina, you'll remember, also turned out some watchable videos, so we're interested to see what comes out of this contest.

As much as I hate to do it, I'm always willing to admit when I'm wrong, and I was wrong about Ocarina. Not about the app itself, per se -- I still think it's one of the silliest, most pointless apps I've seen on the App Store. But it has been nothing but popular since its release, so apparently lots of people out there are into it. That's fine -- I'm willing to accept that there are best-selling apps out there that I think are dumb.

And maybe this will be another one: Smule, the company behind Ocarina, has decided to follow up with a new app called Zephyr (not to be confused with the MacBook cooling system) that seems just as silly to me. You can draw out messages with an airy sound-and-snowflake interface, and then send those messages blowing around the world (represented, in the official video above, by Las Vegas) to random people who, if they like your messages, will pass them on around the Internet. "What's the point?" you might say, and in that opinion, I'd agree with you. There are lots of ways to send messages around the world, and more than a few of them are quite free and will let you be clearer than drawing snow with wind sounds in the background.

But then again, I didn't see a point to Ocarina, and that made plenty of money. Zephyr is available on the App Store right now for 99 cents. And if you do jump in and buy it, make sure to tell us exactly why in the comments below.