Apple has released a software update for iPhone users, and there's good news and bad news.

The good:

• There's an iTunes Wi-Fi music store that will let you purchase and download media directly from you device
• Support for TV-out
• Louder speakerphone and receiver volume

The bad:

• If you've unlocked your phone, you may be out of luck.
• You'll need an AT&T SIM to re-activate your phone after the update.

In other words, if you've already unlocked your phone, we recommend waiting until the iPhone Dev team (the folks who released the unlocking software in the first place) publish an update before installing the new software. Or you could just decide to live without the new features.