It no longer shows up on Rockstar's release schedule for 2008. Maybe it's delayed until 2009?
http://ir.take2games.com/ReleaseDetail.cfm?ReleaseID=258238
Title Platform----------------------------------------------- ----------------------
Sid Meier's Civilization Revolution Xbox 360, PS2, DS, Wii
*EDIT: Oops nevermind it's most likely a typo and the PS2 should be PS3.