I'm pretty sure I'll be getting one at some point, the question is when. The CPU themselves are cheapo, assuming those $300 rumors are true. 4 gigs of Corsair DDR3 is $160 at ZZF, so that's a tad high, but it's been dropping quite rapidly.
So I think for me, it'll come down to when Intel gets around to releasing the P55 chipset. I expect (hope) that by then, a 4GB kit of DDR3 will have dropped from $160-$175 to a more reasonable price (i.e. under $100). Based on the previews so far, it's not clear that there's a major performance increase in using tri-channel, so maybe dual-channel will suffice.