[jespern]

At Atlassian (where Bitbucket now lives), we do something called FedEx (who can ship a product the fastest.) It's a 2-day sprint, where you write up a Shipment Order detailing your crazy idea, giving other people a chance to help you out if they find it interesting. At the end of it, you present what you've done, and everyone votes for a winner.

We just held one a few weeks ago, and several awesome things came out of it. One even shipped the following week: http://blog.bitbucket.org/2011/07/07/redesigned-commits-scre...

It's always a lot of fun, and this, in addition to the 20% time we get, means we get to work on really cool things which sometimes even make it to the public.