If you can't wait for the T-Mobile G1's release, or just couldnt figure out if it's available or not and missed your chance to pre-order, T-Mobile has released a pretty full-featured emulator to play around with. It doesn't have everything (GPS is missing and a few functions just give an error message) but it'll give you a good taste of what's to come on October 22nd. [Cell Phone Signal via Engadget Mobile]