In view of the fact that I can't always respond to comments on this blog due to Blogger.Com weirdnesses, it surprises and dismays me that some anonymous toad has started posting spam comments with links. I delete 'em as soon as I see 'em. It's probably an attempt to fool search engines into ranking a page unfairly highly (if my limited understanding of search engine rankings is correct).
To whomever is doing this: your links usually last less than two days. Go find some unattended blogs to troll; I'm fairly diligent at pruning this one.