Follow-up!
Follow-up is always recommended, if for nothing else than to confirm delivery. However, it also gives you an opportunity to inform them of any new developments in your issue or other stories that relate to yours they might be interested in. The bottom line is to make your follow up unobtrusive. In other words, unless you already know this person very well, DO NOT CALL. Send a brief email note asking them to confirm delivery of your materials and update them with anything new. Even though the package arrived, don't assume they have picked it up yet.
99pr.com
http://www.99pr.com/article.php?story=20050801145942847