While devices dedicated to DTV or bulked up for DTV have rarely struck our fancy, there's something pretty compelling about this new Tivit unit, for whatever reason. A bit like a single-minded MiFi, the device pulls in Mobile DTV video and then pumps it out over WiFi to a single device at a time. Based on how you're accessing it, the Tivit might appear just as a web page of channel listings to choose from, or in a fancier custom-built app on the iPhone, but to all of those devices it streams h.264 video at a pretty good quality. We tested it with the iPod touch, and while the 20 second channel change times were a little frustrating (they c
