A friend emailed me a link to a new HDR/RAW processing program. I looked at the website and downloaded the beta version (unfortunately, Windows only). They have still another approach to merging to HDR, and, like HDR PhotoStudio (now HDRExpose) they appear to deal with luminance separately from color. While all of their features are not yet implemented, I tried a couple of my own HDR sequences and found the results quite good, and the program is quite intuitive. A major feature is that you can adjust tone mapping and color without increasing the local contrast, and the process seems very halo-resistant.
They seem to be onto something good here.
They also have a processor for 2 or more images taken with different light sources but at consistent shutter speed and aperture, that then allows individual adjustment of areas in the image illuminated by each of the light sources in terms of tonal level and color balance, independently of the other areas in the image. Very interesting!
here is the link:
HDR beta