Early in April 2009 HDRsoft released a Aperture Edit Plug-in for Photomatix-like tonemapping. For now it doesn't have blending but they say they will add the blending functionality to a future release of the plug-in. They say that they have no current plans to offer batch processing in the plug-in because of the fact that this plug-in is a edit plug-in. If you are a Photomatix Pro owner there is an Aperture plug-in upgrade possibility.
For those of you that are Aperture users this plug-in adds a nice integration between Photomatix and Aperture that was not previously available.