Being the possessor of a Motorola Backflip, I find that I do not use it for time-wasting Internet browsing. It has four major advantages over my previous dumbphone:

• I can look up words / facts in mid-conversation or while listening to a talk
• I can browse Twitter/Facebook any moment I'm not doing something useful, so I don't feel compelled to check them when I could be doing productive work in front of a computer
• My contacts are all imported automatically from Facebook, and when I call someone I immediately see their last facebook/twitter update and picture (and all other possible combinations of this functionality)
• If I want to find something locally, I can just start Google Maps. It knows where I am and I can call the place with one touch. Also, I can call numbers on websites with one touch.