mikaelh has been hard at work optimizing the code (
10 new commits on bitbucket)
After an hour running this on mainnet I'm seeing consistently higher pps and chainspermin than with hp7 on an identical box
I think it's time for another round of donations to keep mikaelh going

How much higher are you seeing? I would donate in primecoin now but I only mined my first block yesterday and it still is immature - it's going to be at least another day before I am able to use the coins.