I found this site that i presume with an addon it collects everything that happens during a raid.
http://www.lossendil.com/wws/
You can see crazy stuff like who heals who, who got killed by what, etc
I haven't tried it out but it looks pretty informative.
This piece of software is getting pretty popular with raiding guilds. Here's link with a guild site with wws reports, http://www.sigilguild.net/hamlet/WWS/wws-history/ (http://www.sigilguild.net/hamlet/WWS/wws-history/)