Well, aren't you excited? You can get it from
LucasArts or anywhere else for just about every platform. LEC is also
listing some sort of "Sith Edition" of
The Force Unleashed for November 3rd, complete with extra levels, if that sort of thing tickles your fancy.
Provided it exists as a separate entity from the original ill probably pick it up when it comes out if for nothing else than to get the gameplay gamerscore. The game was pretty decent but had some serious arrrgh WTF moments particularly with the star destroyer pull scene and the annoying junk titans. The awesome story kept me playing though for sure