Hi friends, to answer you HDR questions:
There are some HDR BW'S posted before, the last one was on top of page 1110, i forgot to mention it there.
Yes, i think it is easier and better to work in BW with HDR's. The result will in most situations look more "natural" than in color (thats not to say you can not achieve this in color, i tried a lot and hopefully succeeded sometimes).
With the MM, when the highlights are off they are gone, nothing to recover in PP and pushing the blacks to far (when underexposing) gets you grain. That's where HDR can help if you are on a tripod. I don't really like having the MM on tripod with the 21 e.g.. it is difficult to frame exactly the external OVF.
As software i am exporting out of LR to NIK HDR Effex 2 or to Fotomatic.
Any other questions are very welcome.
Cheers
Werner