this fantastic light micro 4/3 camera is -together with the little affordable gigapan-bot-definitively a universal panoramic machine. look at the lenses: 7-14, 14 -...., 40/1.7. i will come out soon. i will try to get one for testing. the will be a g2-version. i thought it will be hd-video only but i am sure it will have photo plus hd-video. my actual canon af 35 ml with its 40/1.9 analogue is only slightly smaller.
Dimensions 126 x 94 x 64 mm (5.0 x 3.7 x 2.5 in)
Weight (no batt) 471 g (1.0 lb)
Weight (inc. batt) 522 g (1.2 lb)
Dimensions 124 mm x 84 mm x 45 mm
Weight (camera body) Approx. 380 g
Weight (inc supplied lens, card and battery) Approx 630 g
It appears that the Lumix G1 is not that much smaller and lighter than a Nikon D40 and it is twice the price, current price for D40 in UK is about GBP 250 and for the Lumix G1 about GBP 550.
The Canon Ixus 90 IS - which is one of the compact cameras said to be suitable for the Gigapan Imager head by contrast weighs 155 g (without batteries?) and is much smaller than a Lumix G1.
I don't think the Lumix G1 is really any more suited to the Gigapan Imager than any other DSLR - you could have a Nikon D40 and a Merlin/Papywizard setup for the price of a Lumix G1 alone.