Receptional_Andy - 3:03 pm on Aug 20, 2007 (gmt 0)

One other note, I did find an older thread whioch seems to be about the same bot:

Possible Bot or Spammer? [webmasterworld.com]

I'm not sure the QC explanation will work here, since I can't see how the sites in question could ever appear for the sorts of words in the referrers (since they don't mention any of the words in question at all).