rdave13: thanks for the link. i am stuck to bed due my ilness, and i am looking for a table that can be used in a bed. unfortunately none of the amazon's are good for that.
100andthirty: you are right about one link not working. it seems like the site has a problem with a server or something.
you asked what are the knees for? well, I guess you have never seen/used a laptop. If you'd have, you would know that when you work on your laptop on your knees, it becomes very hot and the battery is runnig out faster.