A friend if mine is using one of these on AT&T.
http://www.wireless.att.com/cell-phone-service/cell-phone-details/?device=Samsung+Captivate+%28TM%29+-+Black&q_sku=sku4760319#fbid=IGFgxIVMcaw
He likes the phone and is just waiting impatiently for Froyo.
I did a quick review of the specs and this part is interesting
GSM/GPRS
850/900/1800/1900 MHz
3G
UMTS/HSDPA (850/900/1900/2100 MHz)
Seems like it would work fine on both VF (and 2D) as well as TNZ.
Is this similar to the phone TNZ are selling or a different variant again? It's hard to keep up sometimes.

