Here are a couple of articles about Myspace password analysis:
Bruce Schneier's blogBrian Kreb's blogThey also talk about a few exploits that were used to obtain the account names and passwords.
There was a recent case about a
stalker who harassed Amor Hilton on Myspace.
Also, don't think that you are safe just because you have a ``Private Profile.'' Weaknesses in the Myspace website
allowed access to people's private pictures and information. Myspace had
known about the flaw for sometime, but still hadn't fixed it.