Perhaps you'd want to make this a rails3 branch for the time being, but it really only has one change for the before_validation syntax to remove a deprecation warning.
Also ages ago I added ham_count, spam_count and moderate_count methods which I found useful.
Add ham, spam and moderate count methods.
"port" acts_as_snook to Rails 3
Only thing required is adding a Gemfile and changing before_validation_on_create to before_validation :validation, :on => :create