I recently attended the SES Training session in Boston. I participated in the all day course that was taught by Jennifer Laycock of SearchEngineGuide. One thing that was interesting was the mix of attendees, ranging from current SEOs, internet marketing managers, marketing generalists, and P.R. representatives. Jennifer clearly did a great job with planning the course because it was able to provide significant value to anyone, from full time SEO consultants all the way to individuals who have barely ever heard of SEO. There was some really interesting pieces on copywriting, link building, site navigation and architecture considerations, as well as the impact and ways to leverage social media (i.e. blogs, digg, forums, facebook, etc).
I was very impressed with the SES group overall and definitely think this is a group whose events are worth attending.