I have not found a camera in that price range that can "auto-focus while video recording".
Panasonic has announced several new cameras that can.
But they are not available yet and no price has been announced.
Judging from the other features on those cameras, they will likely be priced around $300.
..
its the first time i m buying a camera so i need ur help....
My budget is 200USD.... the lower the better...
my requirements are--
good picture quality
minimum 10 megapixel
Auto focus while video recording (important)
long battery life
high memory
some other things i want but can be skipped to stay in the budget----
HD video recording
good optical zoom
so guys plz give me a few options....

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic