AFK:    Away From Keyboard
ASAP:  As Soon as Possible
AW:      Active Worlds
BFN:     Bye for Now
BRB:    Be Right Back
BTW:    By the Way
CU:       See You
CUL:    See You Later
FYI       For Your Information
FCOL:  For Crying Out Loud
GR8:    Great
IAC:     In Any Case
IMO:    In My Opinion
IMHO:  In MY Humble Opion
IOW:    In Other Words
JIC:      Just in Case
JK:       Just Kidding
KISS:    Keep it Simple Stupid
LMAF:  Laughing My Ass Off
LMFO:  Laughing My Face Off
LOL:     Laughing Out Loud
OIC:     Oh, I See!
POV:     Point Of View
ROTFL: Rolling On The Floor Laughing
ROTFLMAO:  Rolling ON The Floor Laughing My Ass Off
SOW:    Speaking Of Which
TIA:      Thanks In Advance
TTFN:    Ta Ta For Now
TTYL:   Talk To You Later
TTYS:    Talk To You Soon 
TY:        Thank You!
VC:       V-Chat
WYSIWYG:  What You See Is What You Get
YW:       You're Welcome

Here I have recreated a list of shortcuts for abbreviated Chatting... Using these with some People may cause them to ask you what it means...SO... You can direct them to this webpage.  Everyone print out the list so in the future everyone will know what you mean!
Besides... they may have fun !  Please send them here!
Foofoo
vcpages
I Yahoo... do you?  get a website here you will enjoy it !