Besides the "Snowball Showdown," Friday December 15 also had the Third-Party Viewer Developer Meeting. The teams of Firestorm and various other third party viewers sent people over for a discussion with Oz Linden and a few other Lindens in both chat and voice. The meet-up took place in the Hippotropolis sim.
Pantera Polnocy (Panterapolnocy Resident) did the video of the meeting, which can be seen below. Inara Pey wrote up an article with details of the meeting.