Game looks fun and I've been really into fighting games lately.
 
Does this game have a very active online population? Like the kind where I can hop on at any  hour of the day and be able to find people to play against in seconds?
Also which version of it has the more active online community? I'd assume it'd be the xbox version but you never know.

last time i checked, the PS3 version had more sales than the 360 version. with that said, i assume the PS3 version of CT was more populated. 
 
that was Calamity Trigger, though. Continuum Shift just launched so the online should be pretty populated right now 

well im on the ps3 version so if you need a match hit me up.

If you want some duders to play with, there's already a bunch (yours truly included) who have put their gamertags down in this thread.

For the PS3, it seems pretty good. There's plenty of matches up, and it just released. Though I heard that the 360 playerbase is smaller by a bit.