Aperture Plugin
http://apertureplugin.home.comcast.net/
This is built on a power PC. It should work on intel as well, but since I have not tried it yet -- who knows...
Of course, all the disclaimers of use at your own risk etc. apply.
I would be interested what people think. However, since this is not my day job, there are no guarantees of enhancements or fixing problems in a timely manner.
Regards
Dual 2 GHz PowerPC G5, Mac OS X (10.4.8)