A lot of people know about search engine optimization, or SEO, but SMO is a relatively new term. It stands for social media optimization and goes along with the phenom of "Web 2.0." SMO is another technique to help a website or brand show up in the search engines.
Social media optimization basically includes placing a website/person/product/service on the various social media networks (Facebook, Ning, MySpace, LinkedIn, etc.), and social bookmarking sites (del.icio.us, Mixx, BackFlip, Digg) so that the search engines see more inbound links.
The trick is to know which ones of the hundreds out there of social media sites are the best. One place to find this information is at my Squidoo page, Online Networking
Another interesting ebook is The Definitive Guide to Finding the Best Social Marketing Sites
. Bill Ortell has taken the time to go through the many sites and subject them to specific criteria. He examines social networks, bookmarking sites, and video sites. I heartily recommend this book as an excellent place to start.