We have PIZZA, BEER, a report on how awesome RubyConf 2012 was( let's just say, 'there are some cool new things in ruby 2.0'), and then do some hacking on rubygems.org.
So pull down redis, memcached, and the postgresql app. grab the rubygems repo and get your name out in the OSS community. Give back to what has given so much to you.
BTW We can pull your commits in that night, if you pass the scrutiny. So be prepared to find a pair and hack the night away.