I know Phil loathes AT&T and has given up rights to his first born for allegiance to T-mobile. Personally, I'm a bit more carrier neutral, but I do like my iPhone. Apparently, for those who have jailbroken their phones, there's the first virus appearing that exploits those hacked phones. According to posts:
....a harmless exploit that simply changes the user's iPhone background to an image of singer Rick Astley...
which is already very close to my current iphone background:
Update (Phil): If you've unlocked your iPhone and haven't reset the default password head over to Cult of Mac for a quick step-by-step. Only necessary if you've installed SSH.