@ Strell's rant:
It would be nice if this game were eventually released on the other two systems primarily because both have a larger fighting game fan-base (speculated solely from the 2009 fighting game releases... SF4, BB, MvC2, T6...). Personally, I'd also like it better on a system where I can talk to my friends if I am doing a player match. Nintendo fails at online vocal communication.
That said, I am already aware of why this game was released for the Wii. I was tempted to import this before it was announced that it was going to be locallized. I'll pick it up on Wii, hopefully SL4IN will too, and we can all beat the living shit out of each other when we next get together.
Unfortunately, I do not forsee playing this game online a lot because I have a better stick for my 360 (and the aforementioned fighting games to play with) and I like being able to talk to, and hang out with, my friends when I do player matches. This game will just have to spark a revival in going over to friends' places.