Hmm, that's very interesting. Well I imagine that my VFX artist is going to need metadata so that probably rules out the TIFF > photoshop workflow. Even still I just gave it a try and I'm not sure exactly what my problem is but I can't seem to figure out how to save openEXR out of photoshop. I'm running CS3 on OSX 10.6 (which does support openEXR) but it is never choice is my save dialogue boxes. What am I doing wrong...? I output my TIFF with Camera RGB color space and linear gamma space out of Clip Finder and brought them right into Photoshop and then without touching a thing and tried to save them out as openEXR but the option is not available.
Thanks again for all the help, you have all been amazing