Pool hash rate kept going up & up but it seemed like it took longer & longer to solve blocks, then it died.

doublec twitter on Jun 6 "Rewrote my namecoin mining pool server in Ur/Web. Old server hit 100% and died at 20 getworks/s. New one at 45 getworks/s and going fine."

Looks like ~130 getwork/s is current limit, I don't remember it getting much higher. This is the only namecoin mining pool at the moment so it got pretty busy.