I've heard that this is something that schoolteachers are having to deal with these days--lots of term papers handed in in chat shorthand. "Moby Dick z a gd book. a/s/l?"
The only concession I've made to online-speak (and code-speak) is my use of initial caps. When I begin a sentence with a word (or nickname) that isn't capitalized, I don't forcibly capitalize it. rastbastid is the name I chose when I registered, for instance. lurkette is my wife. It just seems most polite not to misspell people's names, and capitalization counts, right sleepyJack?
It also counts in a command-line or code world. "uptime" is what you type on the console to get the system uptime and current load. "Uptime" gives you a "command not found" error. What is the executable for the Perl language named? perl, of course!
"leet haxor" is spelled 1337 h4x0r, by the way.