Is correct grammar on the Internet important to you? Or could you care less about it and continue on with your textspeak?
For me, I think a person's grammar reflects on how intelligent they are. I very much dislike bad Internet grammar, though I tend to let people slip by with it, because I am more tolerant than others. However, I'm all for abbreviations and whatnot on the cell phone texting, since it saves time and it costs cheaper in certain cases if the message has less characters. And if English is your second language, then misspellings and grammar mistakes are acceptable, because each language has different grammar rules.