Sprint's version is ok but Verizon is releasing on Feb 1st. VCAST thier own form of tv for cell phones but it uses their EV-DO network. (a wireless broadband network)
VCAST willcost about an extra 15 dollars amonth to a plan so i'b gussing Sprints should be around the same
Also from what i have read, battery life is not badly affected by this feature.
http://www.engadget.com/entry/1234000663026507/