Another way to position yourself as an expert is to put yourself in the Yearbook of Experts. I personally have not chosen to do this yet - it is a bit pricey ($995 for a simple reference listing) - however it could be an effective way to establish yourself as an expert and get the media calling YOU.
Unfortunately the 2007 edition has already closed, but you can learn more about The Yearbook of Experts, and decide if you want to budget for it in next year's marketing plan at www.expertclick.com