@ Abdula:

First off, stop making these long-ass posts! Damn!
Second, I don't really know about the colouring of chakra, but I've always stated the obvious by thinking Naruto's chakra was distinctively blue as the Kyuubi's was red. So by mixing the 2 it would turn purple yes. I pretty much still think of it as I said in my previous post. And remember, Naruto has been training for 3 years, wich could mean that the Kyuubi and Naruto could have come to some sort of understanding and found a way to mix both chakra's.

@ poopdeville:

Abdula pretty much said what I was going to say, because it really isn't that obvious... As you said yourself, compressing chakra by rotating it is called the Rasengan. Sure it kinda looks like it, but I still don't see any rotating in the balls surrounding four tailed Kyuubi.
Though I've read somewhere that the rotating could've been that fast that it looks solid, but that has yet to be proven. Yes, Rasengan is pretty much the only way we know how Naruto, Jiraiya and the Fourth? control chakra into a ball... But ask yourself, how much do you know about the Kyuubi? What makes you think he can't form a ball of chakra? Have you ever seen him fight without being sealed in some boy? All I'm saying is that I don't see where you're basing this on, so there for it is not obvious to me that those balls are Rasengans. I'm not saying that they aren't cause that hasn't been proved (yet) in the anime, but it also hasn't been proved it was. How about waiting a couple of ep's to find out?