I think they are out on the streets now. How are they performing and how do they compare with the 5DII?

Kevin.

If you're considering from the video viewpoint (just a guess since you cite the 5DII), you might check Vimeo's 2 groups---GH1 and 5DII. Look especially for Phil Bloom's videos. AFAIK, right now they are only available in Japan but soon will be in other parts of the world.

Diane

Here's some good info:

http://www.dvinfo.net/conf/panasonic-lumix-gh1/

yup will get one