I'm not quite sure what to make of his finishes. Some of the blocks do look great, but a lot of the other images on the site show blocks that appear to have been cut in a single pass, while feeding waaaaaay too fast.
I do like his idea for an HDD cooler, though:
turn it into a 5 1/4" bay adapter, and cool through the (typically) flat sides.
Then again, since my primary heat producers (2x IBM 36Z15s) have nice, flat tops, I'm planning on going the standard route.