Entourage - How to get rid of it??

I installed the micro soft sweet some time ago and thought I would use Entourage. I ended up not liking it but can't seem to flick this booger. In iCal I keep having these random entourage calendars pop up and when I delete them they come back. I assume it is some kind of sync thing but can't get rid of it. Help.

 

"This calendar is automatically created by Microsoft Entourage"

This is what is says when i click "get info". As far as I thought I uninstalled Entourage.