Something new, unexpected, and possibly worrying has popped up in iTunes. iTunes now "calls home" to the Apple mothership whenever you restore an iPhone or iPod touch. It tells you that it's "Verifying restore with Apple...", checking your device identifier and the firmware with Apple's new signature server.

Today, TUAW has the pleasure of talking with Jay Freeman, otherwise known as "Saurik", the developer of Cydia. Saurik has constructed a server that duplicates Apple's functionality, ensuring that you'll be able to downgrade your iPhone or iPod in the future, even if you have not jailbroken your device. This topic is for all iPhone users, regardless of whether they use jailbreaking. Please join us with your questions and comments as we hear from Freeman about why this move matters to you. Read on to see the full live chat transcript.

Please join us this afternoon at 4:15 Eastern for a live chat with Jay "Saurik" Freeman. Jay is going to talk to us about Apple's new signature server and what that means to you as an iPod or iPhone owner.

Have you noticed a new message in iTunes when you restore an iPhone or iPod touch? "Verifying restore with Apple..."? iTunes is now checking your unit against a registered database and deciding whether to allow you to install your firmware or not. Potentially, Apple could disallow downgrades to previous firmware versions. According to Freeman, this move allows Apple to "recall existing firmwares by keeping people from restoring to them in the future. To do this they simply would refuse to ever sign, for example, iPhone OS 3.0 again."

Freeman will explain why this is a real problem to both the standard App Store community and to the jailbreak community. Join us with your questions.

We recently got a tip over to this It's Just Poison post about Veency for jailbroken iPhones from Jay "Saurik" Freeman, the author and maintainer of Cydia. Veency provides a VNC remote desktop server for your iPhone, allowing you to connect to the shared screen of your handheld from any VNC client (Apple Remote Desktop, Chicken of the VNC, and more).

I downloaded a copy to my iPhone, rebooted and gave it a whirl to see how well it worked using Chicken of the VNC on my Mac.

From first go, it did what it promised: offering tap-interpretation of my Mac-based mouse clicks as iPhone-sourced finger taps. The current mouse position on the Mac was echoed as a small "x" on the iPhone, so I could always see where the virtual finger was.

Way back, one of our readers begged for an iPhone LoJack solution. He wanted his iPhone to "call home" regularly in case of loss or, let's be more realistic, theft. Over the past week, I finally had a chance to give this request some time, and I put together findme. It's a command-line program that returns the location of the cell phone tower nearest to your iPhone. When run, it tells you the tower id, plus its latitude and longitude courtesy of Google Maps.

Still, how to get the location report to a place you can get it... but nobody else can... and without receiving a zillion SMSes? For this part of the puzzle, enter Twitter. Twitter dev Britt Selvitelle helped walk me through the setup for a private account that allows your iPhone to phone home but keeps the location data relatively secure.

To do this, create a new Twitter account just for your iPhone (it will need its own unique email address, separate from your main account, so have one handy). Open the Settings panel, and look for the "Protect My Updates" checkbox. It's towards the bottom of the page, just above the Save button. Check this and click Save. With protected updates, only the Twitter users you approve will see the updates for this iPhone-only account (just you? you + spouse? spouse, kids, and "special friends?" Up to you).

Update: I've put an updated version of findme (findme-better) into the TUAW folder on my site. Please let me know if this works better for location for you. To use, just copy to your iPhone (you may have to use Firefox if you get errors after downloading with Safari), rename to "findme" and replace the original findme.