rating system

does anyone know a very flexible rating system, written in php of course? i have an application where i want to rate different data that the application saves and may relate the data to each other. I.e. a very active/known/famous/any-attribute user rates an item, then this vote might weigh more than one who is "unknown" to the system. This means you might also be able to rate a user and have some algorithm to show the result in a weighed way. And besides it should also do things like: let every user only vote once a day/month/hour/..., and all this common stuff. thanks for the help -- Wolfram ... translating template system ... http://freshmeat.net/projects/simpletemplateii