AdultFriendFinder.com
103,070,536 passwords already plainly visible
232,137,460 passwords hashed with SHA1
99.3% of all passwords from this website are now plaintext (cracked).
As someone who cares about security, this is very, very painful to read. But it also makes me curious about that password data set. It might be used for security research, like estimating the entropy of passwords more accurately.