Cameralabs made a nice 1080p video comparison:
http://www.cameralabs.com/features/1080p_HD_video_comparison/GH1_vs_5D_Mark_II_vs_SX1_IS_vs_HX1.shtml
Cameralabs made a nice 1080p video comparison:
http://www.cameralabs.com/features/1080p_HD_video_comparison/GH1_vs_5D_Mark_II_vs_SX1_IS_vs_HX1.shtml