I see over at Gamestar that the final hardware requirements for the PC version of Star Wars: Knights of the Old Republic were posted. A 733MHz CPU, 128MB RAM and a Geforce gfx card happens to be the required minimum. As for new content and options: resolutions up to 1600x1200 are supported. Three texture packs are featured. The standard set will be used if your graphics card has 32MB RAM, the best package can be seen if it's 128MB or above. The alien race textures were upgraded, too. There's a new location (Yavin space station) as well as about 100 new items and some new light saber crystals. Upcoming patches can be installed via auto-updater. As already mentioned earlier, the controls were revamped for optimal mouse/keyboard support. The game is currently set to ship on November 11th according to EBGames.
And while we're at a LucasArts-related topic, the L.A. Times (free registration required) is reporting that Simon Jeffery, President of LucasArts Entertainment, has "abruptly resigned." No further background information was given.