In 2011 SONY’s Playstation network got hacked, 77 million accounts have been compromised, and more than 1.000.000 passwords - saved in plain text (!) and/or easily “hackable” MD5 hashes - have been published. Troy Hunt has made a very interesting analysis of these passwords, including some stats on password-reuse. Worth reading for everbody who’s interesting in passwords: http://www.troyhunt.com/2011/06/brief-sony-password-analysis.html