The text file dump is a little dirty, some example (fake) contents:-
1337::1337:'':''
31337:ema...@hotmail.com:31337:'':''
314159265:ema...@hotmail.com:314159265:0xB1B3773A05C0ED0176787A4F1574FF0075F7521E:''
1234567890:ema...@hotmail.com:secretpassword:0xE5E9FA1BA31ECD1AE84F75CAAA474F3A663F05F4
2345678901:ema...@hotmail.com:2345678901:0xBBCCDF2EFB33B52E6C9D0A14DD70B2D415FBEA6E:0x5BAA61E4C9B93F3F0682250B6CF8331B7EE68FD8
After some grepping, I found an email address that someone I know had used that was in the list.
With their permission, and after advising the holder of that email address, I requested to decrypt their passwords.
Thankfully in this case the passwords are no longer used, and the respective email address had long been treated as a spam hole.
So in short, if you know of anyone that's ever used myspace, be sure that they: