During my last travel to Andalusia (Spain) I made a lot of HDR shots, all of them were shot without tripod. I knew it was a risk, but it worked out fine for me. With the current versions of Photomatix and Adobe Photoshop (and probably many others) you can correct the horizontal and vertical shifts automatically, and you have the option to reduce ghosting artifacts (moving people, tree branches and other objects) So all those hand-shaken images are still useful. And of course some of the HDR’s are ‘single’ HDRi’s.
