At end of April 2009, Joachim sent this out to all developers at Unity:
We want to try one more thing... On Friday work on something cool.
I think there are a lot of low hanging fruits in Unity where somebody with drive can just do something cool that pushes us forward. Things that are hard to put in words, but just make sense when you see it done.
So every Friday, developers can work on something cool, something they have been craving to do for a long time. A feature, a demo, a tutorial, a video tutorial, docs, cleaning the toilet, something on the website. Whatever. Be creative, push the envelope.