Topic: Star Rating


I am looking to implement a star rating system on one of my apps.  I have checked out all the tutorials that use acts_as_rateable, but they all deal with the fact that users must be loged in to rate something. 

I am interested in something similar to the one on where you can rate something without being a member, you can have several star ratings per page and one that only allows each person to rate something once.  Does anyone know of a tutorial or a plugin with these features.