Replying to HDRi

Anyone experimented with HDRi (High dynamic range imaging)

http://en.wikipedia.org/wiki/HDRI

The basic concept is that you take several photos using the same framing on the same subject (same picture several times) but change the shutter speed for each photo. Then using whatever software you combine the best lit parts of each photo in order to have a "superexposed" image where every part of the photo has the desired lighting. Some of the examples i've seen are almost eerie because they're so cool.
I've just started playing with it some and i wanted to know if anyone else has.