this hack would not be possible without the HackMac framework by Mike Ferris.
This is a Cocoa Input Manager Hack that takes keyboard input and makes it into "leet speak" in all cocoa apps. Warning: tends to make a new console window unusable... hehehe...
leet speak is the usage of such colorful letter replacements as the number 3 for 'e', the letter 'x' for the combo 'ck', and changing 'o' to the number zero.
to install, put the leet directory into ~/Library/InputManagers/
typically the InputManagers folder is not there, so you may need to create it.