Yup - I remember your posts on HoFo as well Moving from T-Mobiles very well built/mature GSM 1900 only network to the former AT&T Wireless GSM/TDMA/AMPS network which had extensive use of AMR half rate was bad. I was one of the lucky few with a Motorola seem edited phone for AMR-Full rate. I'd be picking a G1 if I could get my corp discounts on T-Mo.
I'm a hold out for a decent device (attempting to have work replace my Blackberry 7100i Nextel - yuck for something better... probably iPAQ 910. My current 'sacrifice' might be a tilt (purchase for $99 - 1 year contract ) - I just don't like the screen. I'd probably have a G1 on T-Mobile by now if it has a remote desktop client. It has SSH client (needed for me) and nearly same screen size (3.2" vs 3.5" for iPhone) and same resolution - 320x480 (tilt = 240x320 ) Many newer devices are 640x480, but small 2.8" viewable. Pictures will look sharp, but difficult size for SSH client.
I'm a hold out for a decent device (attempting to have work replace my Blackberry 7100i Nextel - yuck for something better... probably iPAQ 910.