ZOMG is OMG with the Z that comes from pressing the shift + Z button (on accident) then typing OMG.
?OMG is for people like me that use the other shift key.
often confuses the hell out of people because they incorrectly think "oh my god??"
also used as ?OMGOSHHI2U
and for the ultimate shift-key misuse: ?OMGOSHHI@U@
Linda- "I'm playing checkers, what about you?"
Brennan- "OMG. Me too! You should come over and we can play checkers then you can fondle my bacon strip and surrounding area!"