Updated the term "GG." Meant to do this for a while, but stumbled upon the subject again.
We all know GG normally stands for "good game." But for Diablo, especially, GG now means "godly gear" or "godly geared." This is a GG (godly gear) Mempo of Twilight. He/she is a GG (godly geared) barbarian.
Something new to add: I think "BoA" is a term that'll become quite popular in the next few weeks, thanks to the Marquise gems ;-)
Oh, and off-topic, great all-in-one wizard guide you've got going. I really think it deserves its own thread just because you're the only wizard response in this "Helpful Hints of Sanctuary" competition (every other class have had three or more so far).