Host suspended server for high load.
You guys don't get to see the number of spambots which hit the server, as most sPa/\/\ gets auto filtered out.  But unfortunately, there's a heap of "dumb bots" which keep trying even though they're nowhere near successful, and causes load spikes.

I've blocked HTTP 1.0 requests, which bots seem to typically make, as I can't really think of any legitimate request that isn't HTTP 1.1.  Some proxies do only support HTTP 1.0, so if you're having trouble getting any pages, and you're on a proxy, I'd like to hear it.