I haven't told a single person my hotmail address, nor have I even used it to send mail, yet I get a few dozen spam messages per day on it.
I'd heard that Microsoft was in the business of spamming, but that's pretty weak. You'd think they could find other ways to make money.
Not that I care... I just get sick of that stupid thing popping up to tell me I have mail. Now that I think about it, I can probably disable mail notifications. Update: Nope... looks like you can't diable new spam notifications. Retarded.