I'll take your word for it... mine is switched off - I don't do much low light shooting (didn't you have a D700 at one time Terry?)
Yes, I did have a D700 switched to a Sony A900 when I was going to Iceland.
The A900 gave me high resolution for landscape, love the feel of the camera and ergonomics of it. The Zeiss lenses (with special kudos for the 135 f1.8) are just really nice. While the Sony is noisier in low light when you reduce the shot to the size I would need in those situations I wasn't missing too much in the ISO department. I also found that in most situations, I could do fine with the G1 and 25 lux in low light (social settings) and I then had a lot less bulk. When I made the switch I also sold my M8. Now running on two systems:
A900 12-24, 24-70, 70-300, 135
GF1/GH1 7-14, 14-140, 20, 45 (my carry everywhere lenses)
extra lenses available for m4/3's
14-45 (Panny), 14-42 (Oly), 45-200 (Panny), 17 (oly), 25 f1.4 (Leica 4/3), 40 f1.8 (Konica) 50 f1.4 (Leica M) 75 f2.0 (Leica M)