[Rez]

the flaming lips/bootsy collins sounds ACE

autechre/sigur ros (after hearing what sigur ros can do when they decide "b-side" means "experiment all you want", i think they could do some KOOL-ASS shit together)

underworld/orbital (a bit dated, but they could compliment each other well, and orbital need to get some semblance of a plot after "the altogether")

out hud/lightnig bolt (the most uber of neo- indie/hipster crap together. beats and funk with ass-raping brutality. funs!)

flaming lips/anyone (really)

Basement Jaxx/Beyoncé (O. M. G.)

daft punk/chemical brothers (this shoulda happened 5 years ago. still damn good at what they do, this might be seen as old bastards at their end, but this would be great for me)

mum/aphex twin. (mmmmmmmm....)

s'all i can think of right now.