In my time I have made laptop treys of "Dinner treys" with aluminum foil heat dispersing manifolds. For a while, when I had my diddy little Vaio, I had a hand made wooden plate that was perfect in 90% of ways.
The problem is one of comfort and fuction. And it is close to being solved... for now.
Introducing the Belkin Sleeve Top.
Its a laptop case/rest thats designed for the home.
Carrying your laptop from one room to another,
Keeping on your laptop on your lap with more comfort than without.
Offering a modicum, of protection to the aforementioned laptop.
It stops your balls frying.
If I lose it, I would get another one right away.
Check it out on the Belkin website:
17 quid in Staples