Setting your rates - Media Artist Secrets Podcast
Franklin McMahon, host of the Media Artist Secrets Podcast had some very good things to say on pricing your services.
While his comments are directed at "creative" professionals such as designers, I think his comments and advice apply equally well to high-tech professionals. While you will find the entire podcast useful, the section on setting your rates occurs at 6:10 into this episode.
Listen to Media Artist Secrets - Episode 41