From The Register:
Microsoft opts Passport holders into spam hell. Trusted Computing at work.
Passport is Microsoft's bid to authenticate users no matter where they go on the Net. (I wrote an in-depth article about how Passport works earlier this year for PC Magazine.) Microsoft has said over and over that no matter how attractive a business it might be, they'll never ever sell all the information that Passport collects.
Good to know that we can trust Microsoft's intentions, isn't it?