I'm looking for a Windows box with a very small form factor. Like, the kind of size that can fit behind a wall-mounted TV (not flush-mounted, of course).

My preference is for a computer running Windows 7, with enough oomph to run video calling applications like Go To Meeting. I suppose Atom CPUs are out because I'd like to be able to have it do HD video (at least, my Atom-powered netbook is incapable of handling HD Youtube). It should also be able to drive a TV, so HDMI is good.

I guess what I'm hoping for is the successor to the Acer Aspire Revo. Is there such a thing? Didn't Intel have some sort of platform they launched recently?