I love Apple products and my iPhone, but 3G alone is not enough for me to get one...it will likely have 16 Gigs of Space (a must for me to upgrade), MUCH better speakers, better camera, a built in i-Sight for Video Conferencing, the Charcoal boarder like the Touch (the chrome is too shiny) and maybe a GPS (although I really don't care to much about this, and I don't think it is coming for a while).
Most of what I am looking for in regards to the iPhone can be achieved through software updates (like Chapter Marker selection menu for videos, games, voice notes, finder, radio, video capture, lyric support, ability to create playlists in the phone, To-Do-List and Note syncing with Leopard, SMS Multiple Senders, MMS, Ringtone Pass-Through to Bluetooth Headset, Master Inbox for Mail App) so I am not going to be so eager to buy one right away when they update since the software will likely match that of the new phone (minus anything hardware related of course, like GPS)...of course, I say this now when I think about it rationally, but when I see Jobs presenting it in one of his Keynotes I might not be able to resist...