If you're getting a volleyball game Outlaw Volleyball with it's online play and girls just as good as DOA with movement in all the right places OV will surprise you. Check out the characters.
Outlaw Volleyball characters Summer and Shawnee almost make it worth it alone. Yes this game is confirmed for xbox live. Its' gameplay is described as a cross between Sega's Tennis and Outlaw Golf/South Park attitude.
EDIT: Heres a few looks
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