Version 0.2.1 of Motor, the asynchronous MongoDB driver for Python and Tornado, has been released. It fixes two bugs:

• MOTOR-32: The documentation claimed that MotorCursor.close immediately halted execution of MotorCursor.each, but it didn't. MotorCursor.each() is now halted correctly.
• MOTOR-33: An incompletely iterated cursor's __del__ method sometimes got stuck and cost 100% CPU forever, even though the application was still responsive.

The manual is on ReadTheDocs. If you find a bug or want a feature, I exhort you to report it.