There seems to be some confusion about the basic differences amongst the four currently available Micro Four Thirds cameras. I've tried to summarize the major points in the table below. Unique strengths and weaknesses are highlighted.

	Panasonic G1	Olympus E-P1	Panasonic GH1	Panasonic GF1
In-body image stabilization	No	Yes	No	No
Multi-aspect ratio sensor	No	No	Yes	No
Smallest size	No	Yes	No	Yes
Integrated EVF (best in class)	Yes	No	Yes	No
Available kit including OVF	No	Yes	No	No
Available add-on EVF	Not applicable	No	Not applicable	Yes
Autofocus with all standard 4/3 lenses via adapter	No	Yes	No	No
Faster autofocus	Yes	No	Yes	Yes
Articulated LCD	Yes	No	Yes	No
On-board flash	Yes	No	Yes	Yes
High res LCD	Yes	No	Yes	Yes
Video	No	720p Stereo	1080i Stereo	720p Mono
Kit zoom comments	-14-45mm -Larger than Olympus -Stabilized	-14-42mm -Collapsible (small) -Susceptible to blur at medium shutter speeds per Imaging-Resource	-14-140mm -Video optimized -Stabilized	-14-45mm -Larger than Olympus -Stabilized
Kit prime comments	Not available	17mm f/2.8 kit comes with OVF	Not available	20mm f/1.7 lens has strong early reviews
Anti-aliasing filter	Slightly weaker (more aliasing, better resolution)	Slightly stronger (less aliasing, lower resolution)	Slightly weaker (more aliasing, better resolution)	Slightly weaker (more aliasing, better resolution)
Control dials	One	Two	One	One
Art filters	No	Yes	No	No
Price	14-45 kit: $714	-14-42 kit: $800 -17mm kit: $900 (includes OVF)	14-140 kit: $1500	-14-45 kit: $900 -20mm kit: $900