For those librarians out there doing either chat reference or IM reference, here's an online glossary of "Net Lingo".
Do people actually use some of these?
ANFAWFOWS - And now for a word from our web sponser
AWGTHTGTTA - Are we going to have to go through this again?
DYSTSOTT - Did you see the size of that thing?
TEOTWAWKI - The end of the world as we know it
Of course, this glossary contains more than just common (or perhaps uncommon - see above) IM acronyms, including such terms as "america offline", "angry garden salad", "newsfeed", "wireless network", "word-of-mouse", and more.