Here is a new addon for shadowpriests to make ur spells 100% uptime... handy raid addon! Check the vid:
[ame=http://www.youtube.com/watch?v=T6b49x87uGk]YouTube - Event Horizon WoW Addon[/ame]
One downloadlink:
EventHorizon : WoWInterface Downloads : Casting Bars and Cooldowns
Have fun and gl ingame