I cOde 31337, KTHXBYE!
If you actually know what I just said, you know it is Leetspeak. Now if you really want to, Adam Lindsay created LOLCODE. I seriously can't stop laughing at some of the expressions and operators for this "language".
Here is an example for getting a file.
HAICAN HAS STDIO?PLZ OPEN FILE "LOLCATS.TXT"?AWSUM THXVISIBLE FILEO NOESINVISIBLE "ERROR!"KTHXBYE
Via Matthew Nash and the new "email me if it is cool" hotline.