Congrats. What is the license? I must be missing where it is and the source code I checked doesn't have it.
Honestly, I might put this up to an open-source vote.
I personally learn towards the MIT and the ZLIB license, http://en.wikipedia.org/wiki/Zlib_License .
However I also know a lot of other databases are doing AGPL, I think for monetary reasons. Which :/ I might also want to consider.
But as I said, I honestly think this should be a combination of community decision.
Could people reply back with what license they'd like?
If you value free software (as opposed to open source), AGPL is a good option and allows you to sell more permissive licenses to everyone who needs one.
If you actually want to make money with this, it's really a question of your business model. I would use it with either license.