Hi guys, just a head's up. The new Open Candidate for Fusion 6 just came out and it has *.R3D support built in. It's great.

As far as I can tell all the options from REDcine are available straight from within Fusion's loaders. ISO, White balance, color space etc can be accessed. It makes working with R3D files lots and lots easier and quicker.
If you're on Fusion subscription be sure to check it out!