http://www.photozone.de/dslr_reviews/424_panasonic_g1

This is the first micro 4/3 format camera out the gate

Its interesting because it does away with the mirror / prism system in the SLR making is very compact. The viewfinder is another LCD.

It looks like all the entry level DSLR's will be moving to this kind of format.

One advantage this has for everyone is that the shutter on a DSLR adds a lot of vibration, and this could be done away with.