I've patched this proxy to perform automatic pool hopping, directing requests to the most profitable pools, and have been using it successfully for several days on 3 proportional pools (very hoppable), 2 score-based (slightly hoppable), as well as PPS and solo mining as fallbacks. I don't have exact statistics on the earnings yet, but I believe it's over 20% more than I was making before.

I've only shared my patch with one friend, but I'm considering releasing it to the public for a bounty. Would anyone be interested?