I haven't gotten Battlefront II; wasn't into BF I enough to go rushing out for the second one. KotOR II was good, albeit incomplete, but that's my opinion (frankly, I love Kreia, she was a well-developed character). Empire at War is a bit disappointing. It's mostly like Force Commander and Rebellion rolled up in one, although it's different enough to pretend to be a whole new game. I liked playing it for a while, and I find it addicting sometimes, but it's not so great. So, that's that, Hill.
As for KotOR III not being in production yet by Obsidian, maybe it's possible LA went to yet another company and had them start developing it. LA might be disappointed with how KotOR II came out and went to a different group to have them develop the third game. This may be why no one's coming up with any definitive, concrete evidence on when Obsidian will start it.