While surfing came across this two sites which tell you if your username or email has been in one of the stolen databases.
Obviously page doesn't ask for passwords or similar, you just type in your email address or username and it checks it for you. Out of a few email accounts i use only one showed up as hacked. Not bad idea to check and if necessary change passwords since in the last few years Yahoo, eBay, LinkedIn… have shared their databases with everyone
Here the links
Interesting. My really old Hotmail showed up in some data breaches from a while back, but no mention of the Hotmail vulnerability that caused it to be hacked in the first place.