I'm guessing $999 at a pinch.
Why so? Notice how with the last two launches of 'new' iMacs, the base model has climbed in price by $100? My piece of wild speculation is that this is to lessen the shock of an expensive LCD iMac. 'Only $100 increase' they will say...
Dumb observation of the day: If I turn off my iBook screen backlight, and shine a light through the Apple logo on the back, I can see a small wodge of screen lit up. How exciting. Not. :)
On and on and on and on,
and on and on and on goes John.