Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
The unit is 'fully operational'. TiVoToGo and the like at additional aspects to the service. The TiVo HD supports everything the original Series3 has supported since last fall. The Series3 family hasn't supported network video transfers before, so nothing is 'missing'. TiVo is working on bringing the functionality to the family. eSATA support is brand new, no TiVo has supported external storage. A number of products get released with hardware 'for future use'. The TiVo HD is a nice box - I've had one to review: http://www.tivolovers.com/2007/07/24/tivo-hd-aka-series3-lite-announced-and-reviewed/