We've having some major speed/load issues at the moment. Every time I fix this it's ok for a while, and then it comes back. I don't have time to look at it right now, but I will tomorrow. Of course, by then, it will have fixed itself.

Update: Things seem to have calmed down now, without me doing much.. One thing I have done is limit the maximum number of connections per ip address to four. This should help limit the damage when bots crawl the site. If this has adverse effects on you, though, please let me know.