I’m always pleased to see or read initiatives that reduce blogspam, timewasters, me2’s and the like. Akismet is really good, so are captchas and other little things that make it just that little bit more difficult for people to shat on your blog.
Andy has an excellent post on comments and deterring unwelcome commenters. Well, not quite that, its more about getting people to read your comments policy before they comment, but its interesting and damn useful nonetheless. WordPress specific, but well worth a look.
Good work Andy!