GUIDE TO NET SPEAK:

:)   smile                       ;)    wink

:P   sticking out my tongue      :(    frown

:'(  crying                      :O    amazed

:-)  humorous, joking            >:)   sly

FAQ         Frequently Asked Questions (& the answers)
LOL         Laughing Out Loud
ROTFL       Rolling On The Floor Laughing
TTFN        Ta-Ta For Now
IMHO        In My Humble/Honest Opinion
BTW         By The Way
DH          Dear/Darling Husband [also DB, DG, DW, DF
            for boyfriend, girlfriend, wife, and fiance(e)] 

SPOILER     A post that gives away the ending of a book/movie
LURKER      A member of a mailing list who rarely/never posts