The 2009 Dot Day Parade drew tens of thousands to a sun-drenched Dorchester Ave. yesterday for the annual celebration of all things, well, Dorchester. Above, Chris Lovett captured the scene near Lower Mills. Adam Gaffin has more photos from his perch near Peabody Square at Universal Hub. Adam Pieniazek grabbed some shots of the action near Savin Hill Ave. and writes about the experience here. Much more coming later today.