I presented this talk last night at Sydney PM to a crowd of 12 enthusiastic mongers. Thanks to Catalyst-IT for hosting us, and for shouting free pizza and drinks!

We got stuck for a while explaining to people what mix-ins and roles are... thankfully this is a slide pack so you dont have to endure the endless attempts to find useful metaphors. Also my typo of Role::Tony seemed to endlessly amuse, so I have left that in place.