Well a manual for the A850 has surfaced and been downloaded from Sony sites (thanks to Kyle Batson for the web version). It confirms the idea that the A850 isnt an uber APS body and is, instead, a stripped down A900, so an affordable FF 25 Mp. No I don't doubt the veracity of the manual downloads but something appears a little fishy. What I mean is the very deliberate looking leaking of virtually all the details of the new camera (barring price).
Look at the threads on the A850. The user community is deeply split and no matter what Sony did a lot of people were going to be upset. By this leak Sony is able to let a lot of the venting take place before the release and let us concentrate on the real party trick - the price.
PS - I was completely totally, utterly and unambiguously wrong. I completely misread the tea leaves and admit it freely. Read how wrong I got it.
PPS - I'm actually pretty stoked by that - personally the A850 is looking like the camera I really want.
PPPS - But I am a little concerned on the apparent lack of progress from Sony on some core photographic issues like autofocus.