When writing a cover letter always keep in mind a few key points:
What you should "cover" in your cover letter is this:
1) For what position are you applying?
2) How did you learn of the position or company?
3) Why are you perfect for the position?
4) Who will contact who?
It is best to combine these points into a couple paragraphs that fit on a single page. You want to catch their attention and use the interview to provide the supporting facts. IF you say you will follow-up then FOLLOW-UP!! I like to make a call either way if I haven't been contacted after an appropriate amount of time, usually just a brief inquiry as to the status of position is usually a good starting place.
