hardware support in debian

Hello, I'm Gert-Jan Schouten from The Netherlands and I'm a beginning Debian user. I'm wondering where I can find a list of hardware that is compatibel

with the latest Debian 2.2.r3. I don't see it anywhere on the site.... And if I put a brand new piece of hardware in my computer that is not yet supported by Debian,

will there be any packages for it?? And if so, will you be able to download it from the debian site just like all the other packages?? It is of course also possible that the linux-drivers for new hardware will not be released in debian packages (*.deb) but in common linux archives (*.tar.gz). How should I install them in that case? On your site, you explain how to use the different tools to handle and install debian packages, but I can't find anything about handling and installing *.tar.gz files. I tried Redhat 6.0 a few months ago, and it didn't support my celeron 500 processor. Does Debian? I hope you can answer my questions and I must say, your FAQ is so large, you can almost call it a user's guide :) Keep up the good work!