Ive seen Flea with Janes several times, but I don't think I have seen RHCP live before, if I did, I cant remember. .....Do they do any free form jamming? If so, the possibilities of what Jimmy could do with such an avenue would be mind blowing to say the least....even if it is just for one jam at one show.
Flea does have that RHOF jam in common w/ Jimmy, but to my knowledge, that was the only time they shared a public performance.