Splog Spot

Recognizing the growing problem of spam blogs (or splogs) on the Web, Splog Spot aims to reduce the efficacy of blog spamming by keeping a database of splogs, which can then be used or queried by other systems so that they can keep their sites clean of comments, trackbacks and links from spam blogs.

Splog Spot accepts user-submissions, and has an easy-to-access API, which can be used for verifying whether linked sites are legitimate or spam.