Topic: Rails 3 Profile System

There is messageboxer for mail in Rails, but is there a similar gem for Profiles?

I want to add a profile type portion to my app. Can someone just go over the basic model, db config, controller setup, views, and any routing needed?

I'd like a general overview to get started on this, it doesn't have to be super technical.  If there are any tutorials out there I can't find by Googling?