My point would be that if you're trying to film taking an action on the tablet, something like a screen-cast makes more sense in terms of clarity than doing an actual "camera pointed at me using the tablet" approach. Obviously there are some things where it won't work (demonstrating how to do a video chat for example makes much more sense by seeing what you're physically doing along with what's happening on the software side of things), but for a lot of topics (how to install different types of software, how to change options, etc) it's much better as you don't have to worry about compression in the video destroying the clarity of your shots (and nobody really needs to see you holding the tablet for those types of demos). A screencast is still the same as with video... if you screw it up or do something stupid, you'll have to redo it. And you don't have to put written comments or annotations in, but some software gives you the option to that's all. To the user it'll still look just like a video, but a lot easier to see ;o) It was just a thought anyways... mikkov brings up a good point about the lack of cursor, but I'm sure we could find some creative ways to work around that (not sure about camstudio or Jing, but in Captivate you can have the app add extra graphics to show your cursor or emphasize when you click on things, etc).

The uservoice thing looks pretty neat, though I mean it doesn't have to be technically complicated; it could be something as simple as an extra forum where users can post up requests for tuts or get directed to the ones they're after; whatever works best as long as the mechanism is in place and the users can easily be directed to it is what matters.