Interesting site. How do you plan to make money with it? Think it is a good idea.
All I can think of with "MOBI" is mobiBLU, that little cube MP3 player. I think those are so cute. Wonder if anyone registered BLU.mobi. Hehe backwards but fun.
1and1.com is also offering .mobi .
I am looking to register some .mobi on 1and1.