@pcstokes: It is tricky to filter the spam from the "ham" with some comments. I'm starting to get more hard-line in my old age! If a comment from a new member just says "nice blog!" and contains a link to a fairly low-quality site, that usually results in an instant deletion/ban!
I often toy with the idea of opening up the comments on this site so that non-members can post too, but I feel that the member registration, while slightly inconvenient, does put off a lot of spammers and link droppers.
Cheers,
Matt
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Matt Doyle, Elated
3rd Edition of my jQuery Mobile book out now! Learn to build mobile web apps. Free sample chapter: http://store.elated.com/