Great. Now what do I do?
The article claims they’ve e-mailed who all they think was affected, so I’d suggest the following:
1. Double check your e-mail for notification
2. Login to their site and make sure that e-mail is what you have registered with them
3. Change your password on the site, and re-login with the new password
4. Change the password on any other site you used that same password
5. Be on the lookout for further notices
Good luck.