Search Engine Marketing Professional Organization
I recently found SEMPO. They seem to be a very good organization with the main goal of helping people with search engine marketing.
SEMPO Mission: SEMPO is a global non-profit organization serving the search engine marketing industry and marketing professionals engaged in it. Their purpose is to provide a foundation for industry growth through building stronger relationships, fostering awareness, providing education, promoting the industry, generating research, and creating a better understanding of search and its role in marketing.
They have some very interesting sections to their website including: Training programs, articles and many other resources. I am just getting started with their information, but I have seen enough of it already to recommend it.