I have a GF1 and a G1, they are both great, GF1 gets used more as the video
is great kids etc, as the G2 has video I would choose the G2 – unless you were considering the 20mm lens to get portability , then the GF wins as it is , with the 20mm actually a fantastic portable camera with great quality.
The elephant in the room is the 4/3 adaptors for other systems, I have a number of nikon and leica lenses that are now in use with both the GF1 and G1, I picked up both the GF1 and G1 from ebay, for under 150 each , adaptors are cheap.
So, micro 4/3 is a great thing for folks who have a collection of existing 35mm lenses , for folks who are starting out without lenses it is something of a mixed blessing, yes the cameras are compact, but the 4/3 specific lenses are very expensive and limited in range , the 20mm
is probably the worst VFM lens ever , it does not have stabilisation and
should cost a 1/4 of the rrp .
I have 3 Nikon digital SLR bodies, they are now rarely used , as the Panasonic cameras GF1 with video , and G1 are more fun, unless you use flash regularly.
Not sure if this helps… for me they were cheap camera bodies that digitised some existing lenses, and added instant HQ video as a bonus.