I mined 2 blocks with my single 1CPU/512 MB VPS on digital ocean in the time that I was asleep/at work yesterday.

My AMD Phenom mined 0 though it didn't have internet while I was at work all day.

Since I got hom, I've started two more single core instances, using Chemisist's builds. So I now have three, one running the same build from Sunny that gave me the 2 blocks.

Haven't found anything so far. It's only cost me $0.40 to run all this, though, so it's worth it (to me).