One sign that the iPhone development world is starting to mature is that companies are beginning to build the infrastructure necessary for devs to enable push notification and in-app purchasing. Usually these functions require a developer to make a significant investment in server hardware and labor to set up and operate the push and/or purchase servers, as well as to write code to integrate those services into their apps.

I met with Tim Courtney and Chris Grove of KeyLimeTie yesterday at 360iDev in downtown Denver. Their company's new service, iLime, is a scalable solution consisting of highly reliable server infrastructure and a set of iPhone Application Programming Interfaces (APIs) that make it possible for iPhone developers to integrate Apple Push Notification Service (APNS) and in-app purchase easily.

iLime is making it very easy for small, independent developers to test the waters of push notification by making their APIs and server prowess available for free for up to the first 25,000 push messages each month. After that point, the service is charged on a per-push basis on a tiered pricing structure that makes higher volume more attractive. For in-app purchasing, iLime simply charges a flat US$0.05 fee for every content purchase made through their service.

iLime was first announced at iPhone Dev Camp in August. At 360iDev, iLime announced additional features and detailed documentation of the APIs. Courtney also noted that while there are only a handful of apps in the App Store at this time using iLime's services, several hundred iPhone developers have tested and used the services and they expect a significant number of iLime-enabled apps in the near future.

It's great to see KeyLimeTie making the investment in the virtual bricks and mortar that enable push notification and in-app purchasing, so more iPhone devs can take advantage of these iPhone OS features.

About a month ago we reported that the 360iDev conference was going to be held in Denver, Colorado. The event is now underway, and since I happen to live in the area, I'm attending the event that's billed as the premiere iPhone developer conference in the world.

There are certainly a good number of iPhone developers on hand -- Tom Ortega of 360|Conferences, the group that's running the event, mentioned that the registration was at 225 developers, more than attended the last event in San Jose, CA.

The sessions last for the next day and a half, and there are plenty of opportunities for developers to learn, meet, and party. Stay tuned to TUAW for short interviews and more info from 360iDev.

iPhone developers who weren't able to make it to this year's WWDC are in luck -- the 360 | iDev Conference is planned for September 27 - 30, 2009 at the Curtis Hotel in downtown Denver, Colorado.

The conference is being organized by 360 | Conferences, the team that presented the highly successful 360 | iDev conference in San Jose, CA earlier this year. There's a half-day hands-on advanced debugging session planned for Sunday, September 27th, followed by three full days of sessions by notable speakers such as master iPhone developer Bill Dudney, Phil Libin (CEO of Evernote), and David Barnard of AppCubby.

Conference registration is limited to 400 or so individuals, so if you're planning on attending, it's time to get moving. 360 | Conferences provided TUAW with a special code that you can use to get a 20% discount on registration. Just enter the code phrase TUAWiDevDiscount (case-sensitive) when you register for the conference to receive your discount. They've also provide a discount code (TUAWInMoDiscount) for the InsideMobile Conference planned for this upcoming weekend in San Jose.

With the iPhone app world still showing an amazing amount of growth, this may be the perfect time to build or strengthen your iPhone development skills.

For those of you sickened by the commercialism and resulting chaos of the holiday season, here's an idea to make you appreciate the holidays again: follow the concept of paying it forward.

The concept is easy to understand: someone does you a favor, and instead of paying them back, they ask you to do something good for others. I'd like to ask TUAW readers to help take part in a "pay it forward" project. Let me start by telling you about my project this year.

In this case, I feel like the good people in the Denver metro area have done me a favor by helping my Mac consulting business, Raven Solutions, LLC, become a success. Earlier in the month, I received a phone call from a local non-profit called Art from Ashes wondering if I could provide some assistance with Marketcircle's Daylite application. After looking at the group's website and becoming aware of the healing work they do with at-risk youths through poetry therapy, I decided to donate my time as a way of giving back to the community.

While Pourhardi is camped out an hour ahead of me in Chicago, and will inevitably get his iPhone first (Grr!), I'm sitting here with an Optimus Prime sized iPhone display sending out its reality distortion field from above my head. There are about 10 people in line so far, and I've been able to snap some photos of our band of merry geeks. I'll keep updating the gallery as the day goes on, so check back often to make sure you're up on all the excitement that goes on in a suburban mall.

If you're planning on stopping by this particular store, come up and say hi. I'll be podcasting off and on with various people, maybe even you! I'm first in line and wearing my Daring Fireball t-shirt.

The Denver Post is reporting that Bunch, a 17-year-old teenager in Castle Rock, CO, was struck by lightning while mowing the lawn and listening to his iPod. While scientists aren't laying any money down on how likely it is that lightning sought out the teenager's iPod, the boy and his mother suspect Apple's little white player acted as a sort of  lightning rod in this most unfortunate of accidents. The strike traveled all the way down his earbuds, burning his ears and the side of his face, causing Bunch to lose some of his hearing.

All things considered, Bunch and his mother are just happy that he is alive.

[via iLounge]

Thanks Gidge.