a good laptop riser?

Just wondering if anyone has a riser they love or hate. I mainly needs lots of elevation control with a small footprint suited for a 15" mbp.

EDIT: So far it's a toss up between these two.
http://www.xtand.net/products/show/productid/3
http://www.raindesigninc.com/mstand.html

I have this one - http://store.apple.com/us/product/TK651LL/A
It's fine. Sorry I don't have more to say, but it's...well...a stand. It works.

Laptop riser? This never fails:

http://cdn.wwtdd.com/wp-content/uplo...122_1091lo.jpg

NB This joke assumes that your laptop is on your lap and you are a heterosexual man.

I think HR's the winner although Bar in any situation would be preferable :)