[W-Unit]

Well, as a programmer I've pretty much learned everything I care to learn about doing stuff with just one computer, but I'm fairly limited when doing stuff with the internet.
I understand to a minimal degree the way HTTP/GET works, because it's simple. I'd like to understand HTTP/POST, but RFC2616 really didn't tell me anything, and RFC's are hard to find what you want as it is.
The best way is to learn for me is by watching someone else do it, so I was wondering if there's any way I can sort of look at the raw data my web browser is exchanging with the server to maybe get an idea of how to POST?
If not, could someone maybe PM me some basic info to get me started on POST? Like, if I wanted to GET a page in telnet, then I would type GET /index.html HTTP/1.1 so if I was POSTing what would I type instead?

Thanks.