In case you've not seen the news, gawker (parent co. of lifehacker, jezebel, lots of pop sites) was hacked. Email addresses and passwords FOR GAWKER sites were published at pirate bay and are now out in the wild.
Gawker has contacted those who logins/passwords were released, but you can also check to see if your email is on the list
If your login and password was published on the web, it should only affect Gawker sites UNLESS you've used the same login and password across the web (which is really not a good idea). Regardless, now might be the time to tighten up your passwords.
More on the situation