Helen Hou-Sandí’s got a pretty great idea for folks looking to pitch in on core development:

For 3.7, the biggest goal (at least in my mind) is to blow through Trac and close as many tickets as possible, either through committing a patch or because they aren’t relevant anymore. At close to 3800 open tickets, Trac just isn’t manageable for anybody anymore.

I’ll gladly spend a little time this next cycle doing a little "gardening".