They had an event here in Australia called Supernova, it's basically all about games, comics, anime, and sci-fi all combined into one event.
They had SC4 right there for people to play both PS3 and 360 version side by side, so this is how I got my grubby hands on it, and it was fun.
They also had brawl, but I never tried that, I was more interested in SC4 because this has been the fighting series I like the best, on a side note: brawl has yet to be released in Australia, comes out in 26/06/2008.
anyways it was fun :)