In Canada its depend where you are living
In the low light word, camera will never been enough sensitive...
On my side, the A900 was the worse choice for me to do my main hobby in the past (taking picture in very low light condition with moving subject where the tripod is useless).
I bought the NEX 7 in the same mind knowing the camera will be not good on image quality over to high ISO and a doggie-doo when using wide angle not designed for the camera.
But, like the A900 ... when I get a good picture in low light, I'm happy. And probably this is what make me more happy to use my equipment than having the perfect one ...
The dream of each most NEX 7 user is to have a NEX 5n sensor in the NEX 7. For me at the moment, I prefer to gain better and better experience on using the NEX 7 interface body. Even today I'm discovering better way of doing small action and always impress by the possibilities (like filming and playing at the same time exposure and ISO very smoothly). So, again my dream is when a next model is available with a better sensor, I will only have to buy it and start using it with better image result. Shooting kids outside at the beach show me that I cannot live not without the electronic view finder and also using the electronic viewfinder with the Level indicator to create Panoramic picture handheld.
In low light, for video shooting, I'm using more and more the speed control in manual mode to go some time under the 1/25s and increase the speed when moving subject start by at the same time adjusting the ISO (ISO3200 is very too noisy ... but in some situation this is the only solution).
But David ... what about having very faster lenses for the body today, does will help much better ? (small 18-55 F2.8 ?, or a 16mm 2.0 ... ) to help escape some flaw of the 24MP sensor noise ... Main raison why I got the old Canon LTM 50mm 1.2, and or the 40mm 2.0 most of the time on my camera.
For pocket camera, so far I'm able to bring in a small pocket the NEX 7 + the Leica 40mm 2.0. This by surprise make me the possibility to shoot a small event in a bar with low light when I was there for dinner only ( and with the agreement of my girlfriend to take few minutes for shooting
(yes there is noise ... but I admit I will not use them for stock picture ...)
And a quick film test from this event also : http://vimeo.com/44167553