A couple of weeks ago I contacted Varavon to see if any of their viewfinder loupes work on the larger LCD of the GH3. The response was that they are on the verge of releasing a GH3 specific product. Unfortunately their English is a little rough so I am assuming that their present products don't work on the GH3, certainly the GH2 loupe doesn't.

Doing a little research I found that other companies that make support equipment for the GH2 have not yet released anything for the GH3. In particular Zacuto in the viewfinder department or Atmos in the external recorder department.

What have people heard about in the way of GH3 specific accessories?

Won't the atomos ninja 2 work with the 3. I know there were problems on the GH2 with HDMI out.

They do not list the camera as compatible. I have experimented with the HDMI out and gotten odd results. My Samsung monitor responds well with the GH3, each format and frame rate is clean, but my BlackMagic UltraStudio Mini Recorder somehow confuses the camera into outputting only 29.97p so I can be recording 24p on the card but full 29.97 (no pull down) thru the HDMI. It's very strange.