It's happened. Motor 0.1 is in PyPI. You can now install it with a simple:
$ pip install motor
This is the first official, production release of Motor.
That said, there will be bugs: please file them and I'll respond as quickly as I can.
Motor is now feature-complete and fully tested. I expect to put it on the back burner and concentrate on other projects.
Motor will keep up easily with PyMongo development, because I designed it to. I don't intend for it to lag more than a smidge. For example, PyMongo 2.5 will bring some new security and authentication features; in the following Motor release I'll support those, too.
I believe this is the coolest thing I've ever made. I hope you have fun with it. Tweet me and let me know what you build with it.