an MMORPG
why does everyone make this mistake when it's clearly a
The rules for "A" and "An" are not based on the actual letters, but on whether your mouth starts open or closed on the following word (which USUALLY corresponds to vowel/consonant), and in this case, since you say "Em Em Oh Are Pee Gee" not "morpig" (or something), it is "an MMORPG". There are some other examples, but they don't come to mind.
EDIT: Also, wow, I'm late to the party, I totally didn't realize this was 7 pages long and that I was responding to something from ages ago.
And I've just been reading this highly entertaining thread thinking that bitbot got cut off in mid sentence until your post
The whole ensuing grammar discussion became a kind of fascinating ongoing cognitive dissonance.