My idea encompasses both types of acronyms. The typical perlmonks acronyms mentioned above, and the things that you are likely to see in messages.

OTMH	Off the top of my head
JAPH	Just Another Perl Hacker
TIMTOWTDI	There is More Than One Way To Do It

etc...
Perhaps the page should be devided into two sections or something to explain that they are different...
Josh