If you do not mind typing a few commands in Teminal, you can get the Python scripts at the following place, which do the same thing but it's free.

http://www.ericpatterson.com/blog/?p=202

I do not use Aperture.
I tried on iPhoto '09 and imported the converted E-P2 .ORF files flawlessly.
iPhoto thinks that it's RAW files from Oly E-300.

As Kevin points out, some lens corrected data will not be processed.
The JPEG converted in iPhoto will have some difference from those JPEG straight from the camera.
In addition, the color of JPEG straight from the camera is just lovely.
It takes you some tweak to get close to that color level.

Anyway, it gives on an alternate way to utilize the camera's RAW ability.
Olympus Master software is slow and non-intuitive, IMHO ...