Nice information.
The main page of www.rfc-editor.org has a search option so that you can search using keyword like MIME or IRC.
Also, if you are interested in how the process of internet standards works you could check out rfc 1310, it is called 'The Internet Standards Process" and decribes how these rfc's work in detail.
It can be found:
ftp://ftp.rfc-editor.org/in-notes/rfc1310.txt <-- there

More interesting rfc's are:
The Hitchhikers Guide to the Internet. ftp://ftp.rfc-editor.org/in-notes/rfc1118.txt
30 Years of RFCs. ftp://ftp.rfc-editor.org/in-notes/rfc2555.txt

There are also some 'light' rfc's like
Statements Of Boredom (SOBs) ftp://ftp.rfc-editor.org/in-notes/rfc1438.txt
Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0) ftp://ftp.rfc-editor.org/in-notes/rfc2324.txt