Ignore that error message. While it's somewhat accurate it doesnt reflect the true nature of the issue. We have plenty of servers and they are not too busy. It usually just means one of the servers got into a state where it used up more and more of it's resources until none or little were left. In a normal working situation the servers free up the resources they use as they finish the jobs they are working on. The usual cause of this message is a bug in the code that causes those resources not to be freed up as expected. You've probably all experienced this on your own computers before where the computer gets slower and slower until either it locks up or you reboot it. That's what someone is doing to this server now.
Since this is the busiest day since the launch of our new features Wednesday I'd venture to guess that may have something to do with it. Engineering can look into the logs more on Monday to find out. For now we'll just restart the computer and hope it doesn't happen again.
In the mean time these are working:
[edited: all servers are working now, please use: http://www.auctiva.com rahter than the specific IP's provided here before]