I don't know what Kimimaro (I think it's actually "Kimihamaro", too), but I don't think it's a person...
Kidoumaru said something like "I haven't been this close to defeat since Kimimaro", and Kabuto seems to be rallying people to a kill-or-die fight. Kimimaro is most probably the proccess that Orochimaru uses to choose his servants - only the best out of the best.
So the four sounds that got Sasuke were/are most probably the best of the best...
Also, I don't think Neji is dead. It was just too ambiguos, and he said it himself - he can't die just yet. He probably just fainted - same with Kidoumaru. A little like the Naruto vs. Gaara fight (I still argue Naruto won - at least psychologically!, in which the two of the ended up so battered that they couldn't move.
So... don't die Neji!! Nooooo!!! ::Cheers on Neji::
Also, Shikamaru is hinting that perhaps things will be settled in one more encounter... meaning one on one fights ended with this chapter? Hope so... it can get a little boring.
Finally, it seems that Sasuke wont get to Orochimaru at the end. Oro is too busy taking a shower to go and retrieve him, and Kabuto is too busy watching him taking a shower to do it either. 'Sides, seems Orochimaru wasn't thinking of training Sasuke at all - he just wanted his body to reincarnate into. Now, Orochimaru taking over Sasuke's body would be utterly stupid plot-wise, so I can only guess that Naruto will keep his promise and bring Sasuke back.
[Female ramble]And then Sakura should slap him. At the very least. I know Sasuke could dogde the slap or stop it or whatever, he deserves it! Perhaps someone (Tsunade, for instance) should invent the Slap no Jutsu, specially for egocentric morons.[/Female ramble]