I am intrigued by the look of black & white HDR (but not colour though - yuk!) and intend to process in colour then convert the HDR to b&w, playing with the channels in photoshop.
However I have tried a few HDR free download programs (Windows XP), and they either seem to not work at all, or not be able to save the output in a useful format (plain old jpg would be fine, or a version of tiff that would at least open in photoshop...)
I know the answer is to shell out for decent software, but after experimenting I might like it and not use it more than a few times.
Any tips or suggestions that might point me in the right direction ?