Ptaszek is working on an add-on that's timilar to hdrlightstudio. He describes himself as 'not a script guy', but his result so far is pretty darn impressive!
The great Software which is hdrlightstudio.com does not exist for Blender yet. I decided to create something like that in Blender by myself. I am not a script guy, so I am sure it can be done better, so I am showing my idea here, and if someone can convert this for a nice Blender plugin it would be great! HDR real lights are from hdrlabs.com.