symbols and what they mean

On a Cingular commercial, they have people communicating on phones and using symbols like CUL8R (See you later) etc. The orange thing than sais “I don’t know what there saying, but keep on saying it” or something. on this Message Board they use symbols (I know there is a special word for them, but I can’t remember it) like IMHO, BTW, IIRC, FWIW, etc. the onlyone i figured out and remembered was IMHO (in my humble opinion). What do the rest mean? which have i missed, and what do THOSE mean?

That’s a subject often discussed in this forum.

Some previous threads:

Acronyms (abbreviations?)

Attn Newcomers - Abbreviations

BTW = By the way
IIRC = if I recall correctly
FWIW = for what it’s worth

Also see here:

Chat Terms & Abbreviations at TechDictionary, the online computer dictionary