I've not gotten great results since I've got wind blown foliage in all of them, which gives a weird ghostie effect.
Otherwise, I think it's pretty cool. You should see the HDR that Greg and Jacquie have done . . AMAZING!
P.S. On the photos in the previous post these are my camera settings:
Silhouetted: ISO: 100 Exposure: 1/1600 sec Aperture: 5.6 Focal Length: 194mm
(this shutter speed definitely makes it too grainy)
Non Silhouetted: ISO: 100 Exposure: 1/160 sec Aperture: 5.6 Focal Length: 194mm