Northern Virginia SEM group on LinkedIn.com. Covers SEM, SEO, PPC, and Social Media Marketing

Since starting the Northern Virginia SEM (Search Engine Marketing) group on Linkedin, there's been a lot of interest from people who want to join. The group's goal is to connect business with SEM and Social Media pros so that we can interact and learn from each other

Check it out: http://www.linkedin.com/groupRegistration?gid=162313