The best waterproof laptop case is the one from OtterBox. For some reason, they can't say "waterproof" anymore...but if you toss it into a pool, the stuff in side WILL stay dry :-) Somebody has a video of it being run over by a car.
Seems like Pelican (www.pelican.com) has been doing this for a while, and have cases with all those features, and that you can get handle/wheel attachments for. When I saw the photos above, that's what I thought they were - Pelican Cases.
10/12/09
Here is a closer look at the case:
[www.rainydaymagazine.com]
10/12/09
10/12/09
10/12/09