A few days ago I was courageous enough to hack my GH2 with the help of this great tutorial:

zeroplusplus.com/easy-panasonic-gh2-42mbps-firmware-patch-instructions/

*** EDIT *** New Tutorial for the new Software:
zeroplusplus.com/updated-42-mbps-gh2-ptool-v3-62d-patch-visual-instructions/

I am so impressed about the better quality after the hack. And I only pumped the AVCHD in Cinema Mode 24p up to 42 Mbps. It looks great even in low light. Thanks to Vitaliy Kiselev! I donated him 50 Dollars to keep on hacking. ;-)

Panasonic Lumix GH2
Manual Video Mode (Cinema Mode 24p)
Smooth (-2, -2, -2, 0)
ISO 160 - ISO 3.200
WB Tungsten
Panasonic Pancake 20mm 1:1.7
Edited in Final Cut Pro X
No color correction at all
Music from Magix

Loading more stuff…

Hmm…it looks like things are taking a while to load. Try again?

Loading videos…