6-12 months is a good guess. Usually trickles down in a revision or two. 21.5" core i7 would be one bad ass little machine.
Anyone care to take an educated guess as to when we'll see i5's and/or i7's in 21-inch iMacs? Are there currently any smaller All-In-One PC's with an i7 or i5?
I'd love the power of an i7, but I don't need, or even want, a 27-inch screen. I'd actually prefer a 17-inch screen, but I know heat is an issue.