An interactive style of writing will help you gain readers, but steer clear of SMS lingo if you want to be taken seriously.
People come to your blog out of choice and not any compulsion. If you remember this, the rest is not important enough.
Avoid using SMS abbreviations in blog post and at least run the post through a spell-check in MS-Word before publishing. If the bloggers cannot take the time out to write proper English, why would the readers bother reading through that cryptic puzzle?