Has EpicSki become a panel at the LSA (or MLA)?
The txting argument towards a revision of linguistic conventions and norms is faulty. While those conventions are entirely appropriate in text messaging or chat rooms (or marketing), they do not hold valence beyond those media, not even in e-mail, really.
Those same arguments were being made in the '90s when e-mail became commonplace. It was to be the end of grammar. Way too many journal articles on the subject. It turns out that e-mail has not altered language at all. It became a new discourse. In the end, the discourse theorists were right: there is a social currency that increases in value with the knowledge of how to participate in (and when to move among) various discourse communities. It's common sense to anyone who speaks more than one language.
As it turns out, grammar and syntax are still accurate indicators of a great many things. Even the Chomskyans agree. Not even a rosy-eyed adjunct or an overzealous TA teaching Freshman Comp would accept a paper written even partly in "txtish" (OK, unless perhaps it were in dialogue.) What do you think university admissions officers are looking for when they read essays/personal statements? Verbal skills are not the only thing, but they are very important.
Imagine a wedding invitation or State of the Union address written in "txtish"? Or a cover letter?
"hey...ur corp is kewl <3 lol...gimme a job @ ur office pls. c u l8r. thx"