My guess on Kimimaro would be that maybe Oro till this day was developing a bloodline stealing technique or something like that. Combine this "tech" with Sharingan and maybe he would have been able to copy one too.

And talking about chapter 228... I DO hope Kakashi & dogs don't ignore Chouji and Neji and help them on the way... plus I don't really like the idea of Kakashi showing in the battle before Shikamaru, Kiba, Lee, Gaara, Tenmari and Kankurou... after all their enemis are dead and they are way nearer... If Kakashi arrives befores this guys (and without helping Chouji and Neji) it would really be un-real, even for a manga...