GPUMAX is a nice service, but I'm not gonna use it until there's a EU server, preferably one in the UK for me. Getting too many rejects at the moment with 150ms ping to the GPUMAX servers.
Also, GPUMAX appears to be currently down, getting DDoSed perhaps? Same with eligius I think
My miners are working, website times out with 504 error a lot, but I think it's because just that many people are accessing it.. It works for me enough that I can change the price of my workers.
EDIT: 502 gateway error, sorry. And I get the timeout a lot in the morning, it seems more accessible later in the day for me. I was able to update my miners just an hour ago though, I keep getting a timeout since then though.