I'm in Tokyo (well, Chiba actually, but close enough) and want to get a phone as soon as my alien registration card comes through... Any suggestions? Can anybody explain any major differences between DoCoMo, AU, Softbank, and Willcomm? Help!!! I don't need TONS of features-- like the digital TV, for example (though I guess they don't hurt if they aren't too expensive...).

Mainly I just want talking and email, but bonus points for low-cost, cool design, and useless but impressive features...

Thanks in advance!!