DDR3 is getting cheaper. I remember when I paid nearly $300 for my DDR2 ballistix. Now they are in the neighborhood of $50.
Yes, it may not be a stable overclock or for 24/7 use. It's still an accomplishment nonetheless to run 3dmark03 on air at 4.8 ghz. Most screenshots I've seen are all 1M superpi runs at or around 1.5 volts at 5ghz. So to able to run 3d at 4.8 is pretty sweet.
Again this is sweet if you bench but most people around AT don't. It's all about stability, stability, stability, stability...
That's why you'll never see me post 32M records or 1M scores since no one cares about those things around here. It's all about... "show me your 283253273859273593872 hour prime95 screenshot to prove stability."