If you were wondering when you'd be able to get your hands on the Nikon D300s and its 720p/24 movie mode, the answer is yesterday, apparently. The cam was spotted (along with the lower-rent D3000) at a big box Best Buy, and a bit of testing was performed -- an admittedly limited bit, but there's only so much you can do when the cam is bolted to those annoying six-inch tethers. The updated video recording mode was the thing that underwent most scrutiny, and while the new auto-focus seemed to work reasonably well (if slowly -- and noisily) on stationary