Insightful (if technical) commentary abounds at the Data Mining Blog maintained by Matthew Hurst. Cory Doctorow over at Boing Boing can give you a bit more detail as to why you should. Also..don't miss the link in the above Boing Boing post to Bruce Schneier's comments on personal data as a new form of pollution. Pretty cool. There's a podcast of his lecture if you're into that sort of thing.

-- MDT