Also look out for the IRC addicts that commonly use such lingo in their everyday chat.
It's a wonder they can pass high school english!
U R Kewl, CUL8R (See You Later), not to mention all of the acronyms like TTFN, BBS, AFAIK, and all the others.
Jerry,
One other thing that concerns me is the use / misuse of words like record, wind, wound, etc., which are the second form of homonyms...words spelled the same but can have different meanings.
The first group of homonyms would be words like one & won, fair & fare. These would most likely come into play when using voice rec instead of typing (unless we're referring to those IRC users again).

Interesting situations to consider. Right?, Rite?, Write?, Wright?
C U L8R