Joseph learned a new trick on Friday- he can wave "bye-bye!" He waved for the first time at some random, large, and sightly scary looking, construction worker who talked to him at a local bagel joint. Maybe he was just happy to leave? In any case, here is the proof.
My book of baby milestones says that most babies start waving around 7-9 months, but hey, better late than never! (I choose to believe that the book is outdated...)