I don't either, not in language usage. Now, I'll occasionally use netspeak on the net - for instance, lol (if I genuinely laughed out loud) - in the same way that I occasionally used, e.g., the word fuck when I lived in a college dorm. But generally I'm one of the people who're told I talk like I write and vice versa.
Another commenter said, in a discussion of using MUD, MMORPG and chat emotes in spoken language, I never MMORPGed. I just say "sigh" a lot. I have no excuse at all. I replied,
I know someone who's been doing that since the 80s at least*. It comes from reading comics, I'm sure.
* I'm on your flist. You know who you are.