A class that acts like a model, creates attr_accessors for named_scopes, and then chains together everything when an "action" method is called. It basically makes implementing search forms in your application effortless:

  search = User.search
  search.username_like = "bjohnson"
  search.all

Is equivalent to:

  User.search(:username_like => "bjohnson").all

Is equivalent to:

  User.username_like("bjohnson").all