Website problems...

I think this website has some technical problems:
  • the mail functionality is broken, which results in problems with setting up a new account and getting email from subscriptions
  • sluggish or buggish performance, sometimes pages don't show at all, reporing a MySQL error, sometimes they are really really slow, other times it seems to be working fine.
I wouldn't mind searching for fixes and solutions, even if it means migrating the site to a new server.