Panasonic has announced a new video camera coming this fall, the HDC-SDX1.  What’s unique about this camera is that unlike other Flash-based cameras, you’ll be able to use it as a web cam too. The camera itself isn’t ground-breaking…it shoots HD video at 1920×1080 in the AVCHD format…like virtually all other HD cameras.  But it only records at 17mbps (higher-end...