I'd like to see Ghosts hit the U. I have Blops 2 for PS3, but double dipped and grabbed the U version for $20 via the current Best Buy sale.
There seems to be a dedicated online community, but more importantly I'm finally discovering how awesome the Wiimote/nunchuk combo can be! Really having fun with it, not to mention I was able to play a few rounds of online TDM while making dinner yesterday thanks to off screen play.
I wouldn't expect the U version to outsell any other version, but if they're going to release it, it should be day and date with everyone else.