IMHO IYDK GI

Via NYT: The Next Generation of Online Shorthand

* GI -- Google it
* MOP -- Mac or PC?
* FCAO -- five conversations at once
* IIOYT -- is it on YouTube?
* DYFH -- did you Facebook him/her?
* BIOI -- buy it on iTunes
* CMOS -- call me on Skype
* GGNUDP -- gotta go, no unlimited data plan
... more here.

PS: My personal fav from the list - JUOC!