official htc talk time is 6.3 hours for the 1340 mah battery in the Touch pro CDMA and
7 hours for the GSM version
http://www.htc.com/uk/product.aspx?id=55314
The CDMA Diamond with a 900 mah battery sports a 4.5 hour talk time... when it hits Sprint as the HTC Victor it'll have a 1340 mah battery bringing the total approx. talk time to 6.7 hours! ((1340/900)*4.5)
Honestly... livemesh, orb, and cloud computing in general is really leading me to the question "do I really need a microSD card slot or are 4 Gigs going to be more than enough?"
I might just go for the Victor(Sprint Diamond) instead of waiting for the Pro and that should hold me over until the Tegra devices come down in price.