i dunno, do you think Rasengan is particularly vunerable to copying by Sharingan? i mean, it doesnt depend on just the knowledge of the technique, but the conditioning of your body and how long you have trained, it took Naruto weeks of training just to handle it, and it is after all, what? the third most hardest technique (or was it second?) to learn.

it be pretty awesome though, if sasuke can have chidori on one hand, and rasengan on another [img]i/expressions/face-icon-small-happy.gif[/img]