is there an aperture for windows?

rofl.

no.

well.. you could get an intel machine.. run bootcamp or Parallels for your windows side of the world....and with a simple click.. be in Aperture on the mac.

I move back and forth pretty regularly.

So that would sort of be an Aperture on in a windows world.....about the best you can do.....at this point...

This seems quite unlikely since Aperture relies heavily on Core Image and other OS-level features of OS X. A Windows version would require porting substantial portions of OS X to Windows.

FWIF, Adobe specifically avoided using these features when developing Lightroom.

Cheers,

Andreas