http://www.cheapbytes.com/
You can buy a burned CD for a few bucks plus shipping from cheapbytes...
Keeps you from having to D/L for 3 days.
I personally try to purchase every new Slackware box set that's released, just for the sake of giving some back to the maintainers so they can continue development.
The same holds true for Debian, but RH/Mandrake/SuSE/etc are all corporations, so I doubt that buying the 99 dollar RH server does any good for the developers.
-M