Known issues with the current patch, if anyone feels like playing with this who better knows the code:

1) Needs a __future__ directive to control behaviour
2) test_generators needs to be heavily reworked
3) The test of what exception was thrown needs to also handle StopIteration subclasses
4) Check for refleaks and/or over-freeing
5) Properly provide a traceback for the original StopIteration (not always happening)

Any others?