Well would you look at that, instructions are now available for downgrading your iPhone from 1.1.1 to 1.0.2. It won't downgrade your baseband, meaning so far you can't re-unlock an iPhone that's been 1.1.1-ified, but it's still 1.0.2 in all its third-party application glory. The iPhone Dev Team folks are working on a way to downgrade the new firmware to let people unlock their phones again, but for now AT&T users sitting pretty, and non-AT&T folks can at least do the WiFi thing. There's a video tutorial after the break.

Read - iPhone Dev Wiki instructions
Read - Hackint0sh thread where the magic happened

Ok, so we know how to use your own ripped CD’s as ringtones on your iPhone but here is an updated way to download and use iTS previews with your iPhone - AKA FREE RINGTONES of your favorite songs.

Now, this isn’t for the feint of heart. It requires command-line access and Perl and only works on OS X.