Several forums hacked recently
Just as a quick heads-up, several popular forums have been hacked in the last few days, including SMF's (software used by this very forum):
SMF http://www.simplemachines.org/community/index.php?topic=508232.0 (but not due to an SMF vulnerability, according to them)
Yii PHP framework http://www.yiiframework.com/news/74/website-deface-details/
which makes it clear why one shouldn't be using the same password (nor variations of a simple password) in any two sites.