I just downloaded the new update for DXO which covers my Olympus OM-D. It also covers all the m4/3 lenses that I have with the exception of the Panasonic 14mm f2.5.
Up to now I've been using Aperture 3.3.1 to do the RAW processing and all subsequent manipulations on the photos. Having DXO to do the RAW and then loading the jpegs into Aperture saves a lot of time for me. DXO does a lot of stuff in batch mode that ordinarily had to be tackled individually with Aperture, and Aperture has a hard time simulating HDR processing that is built into DXO. They make a great combination in my estimation.