Karl Fogel, a founder of the Subversion project, puts good writing at the top of his list of skills required in a remote engineer. You can post a brilliant idea to a mailing list, but if it is poorly written “then nobody is going to read it and it won’t do any good. It doesn’t matter how brilliant a designer you are.”
Clear and descriptive written communication is one of the defining skills of a remote engineer. People will judge you not only on your ideas, but by how well you convey them in an email or a bug report. Persistent forms of communication require more consideration than an instant message. Your email should reflect your written style rather than your spoken one. The first step is to review everything you write before you send or post it.