GenderAnalyzer - Determine if a homepage is written by a man or woman.
This (apart from the infuriatingly prudish use of the grammatical term "gender" to distinguish between the sexes) is fun. The software was 63% sure that I am a man. Just follow the link and type in your blog's URL to have the benefit of its opinion on this critical issue.
H/T Normblog (76% likely to be male, apparently)