I've long been mildly irritated and amused by all the people I see with their faces in their phones. Anywhere people are sitting, the youts have their phones out. Even during movies. Weird.
Last night, as I walked three-quarters of a mile to the MS certification meeting, I was using Safari on my iPhone to look at SlickDeals.net. I'm a SAP, Stare-At-Phone guy.
I have something approaching an addiction with the internet. Default activity if I have 10 minutes before bedtime: digg.com. Default activity when eating lunch at my desk: asp.net.
With the iPhone, I have internet access all the time (within the limits of AT&T apparently quite limited 3G network). I hope it isn't a problem.