OMG! I just saw this really cool view finder on a LX3 camera. It's from an old Russian camera according to the owner. Here's a picture of it(taken from the site bbGadgets). I presume it works by rotating the dial to the focal length that you want. That's sooooooooooo awesome man. I want!!!!!
I will be sure to look out for something like this on my next trip overseas to 1 of those really cool antique camera shops. This would make a brilliant addition to my Leica D-Lux4.