Today T-mobile launched the first Android based phone: the T-mobile G1 by HTC.

More info here:
http://www.t-mobileg1.com/g1-announcement.aspx

and here:
http://voices.washingtonpost.com/fasterforward/2008/09/
t-mobile_unveils_first_google.html

Device video here: http://www.t-mobileg1.com/default.aspx