Should I buy the T-mobile G1?

I live in Honolulu Hawaii. There's NO 3G here, but they do have EDGE and there's a lot of Wifi around here. Do you think I should buy the T-mobile G1? Is 3G really that important to surf the web and download apps on the G1? I already have the Unlimited Data plan, also. And, do you guys think that 3G will be revealed in Honolulu any time soon?