OSDev.org

useful I say we should all make one huge tut on our O/S knowledge and put it up on a ftp site or something.
I know there are tons of sites out there that already do this, but none of them could be as useful or huge as one we could make together.
L8r, Kg.

Here's a few:

http://www.openbg.net/sto/os/xml/ (or http://www.osjournal.n3.net/)
http://mobius.sourceforge.net/tutes/
http://osanswers.port5.com/

I consider the openbg.net repository to be the canonical source of documents (at least any I've written, and of several other people); the others contain a variation of this set of documents. IMHO this is the "one big OS tutorial".