It seems that a list of 10,000 Hotmail usernames and passwords has been posted on pastebin.com in recent days.
Pastebin was created as a tool to aid software development, not to distribute this sort of material.
As a result of the interest this story is generating, pastebin.com is experiencing huge levels of activity – as a result I took it offline to ensure all the offending material has been removed, and have adjusted the abuse filters prevent re-occurence.
Edit: please don’t ask if you name was on the list. I have no way of knowing. Just change your password.
Edit #2: things have calmed down now, and I’ve written a longer post about the incident here.