Just wondering, who's planning to jump into the technology when it hits?

I do like the idea of being able to upgrade to 2x quad cores when they hit in 2007, though it's a big entry price...

Also, I've heard that AM3 cpu's *may* be able to be using in AM2 mobos, if that's the case does it hold true for the 4x4 setup? Can I go pov spec now with a single low end CPU and continue to upgrade it over the next couple of years without needing a mobo/ram/gpu upgrade?