I use Zeam which is really light and works a lot better, but TouchWiz goes beyond just being a Launcher. It's linked to hardware and drivers from what I've ascertained from a bit of reading up on it, so there are certain things I can't get rid of. But I deal. Waiting for Cyanogen Mod 7 more than anything. Then again might just keep it as it is, way safer.
Gameloft seem to be doing some quality looking games by the way, but seems that they're so money hungry to the point where NONE of them are available on the market as to avoid Google's 30% sales cut or whatever it is. Bloody ridiculous and very unsporting if you ask me. Especially as they're charging $5 a pop, so their loss is rather insignificant.