Raid Composition Tool

thanks to the tip off from Talulah.
Ever wonder who buffs what etc, check out this webtool from MMO champion. you can play with the raid composition and find out what buffs you will be expecting for WOTLK.

http://raidcomp.mmo-champion.com/

good reviews from wowinsider:
http://www.wowinsider.com/2008/10/08/check-your-raid-comp/