Still using an 8GB iPhone Classic. Works well, but with those rumors of AT&T cutting EDGE service to bump up 3G, I figure I'm going to have to get a 3G phone at some point this year. I'm hoping some hardware update happens in the summer, including 32GB, better phone, A2DP.
1st 2G iPhone 8gb = Cracked Screen, vibrated off table hit skate board
2nd 2G iPhone 8gb = Touch Screen went dead, baby used it as a chew toy during 5 hour road trip
3rd 3G iPhone 16gb = Still truckin, but girlfriend wants 3G (i'm a sucker)
I'm on my third now. First, original 8 GB iPhone. Second, Black 8 GB 3G. Finally, I upgraded to a Blackberry Bold for a few days but it just didn't work for me so I traded it for a 16 GB Black iPhone 3G.