I was never a big fan of Tekken for some reason. I like the panda (named Panda?), I guess, just because I like any panda bear in anything.
If I want a Namco fighting game, I'd play probably play a Soul Calibur game instead.
Even if I was a Tekken fan, I don't think it would be enough to consider the PS3 as a purchase. I mean, the only Xbox 360 game I'm interested in that's not also for the PC (as far as I know, yet) is Dead Rising but I'm not going to get one just for that. It takes more than one or two or three or even a handful of exclusive games. I need to believe that there will be a dozen must-own games in its lifetime. Or maybe I'm just too much of a PC/Nintendo fan (though my brother did buy a Dreamcast off of eBay which included a few games like Soul Calibur).
Other than Soul Calibur II for the GameCube (and featuring Link), and probably some shoddy Tekken GBA game, what Namco fighting games are there for Nintendo systems?