Really like the idea of this, and especially enjoyed that you took the time to make the 2 minute video walkthrough (it made it easy for me to say "ok, I'll give you 2 minutes, let's hear your pitch"). I think the idea of having a focused community will work quite well.

A suggestion: Redis has a very cool documentation system, where the documentation is "live" - for example, http://redis.io/commands/set (scroll down to the example, you can type in the box). It'd be really neat to have something like that integrated with the code side of things.