roodle - 12:05 am on Oct 11, 2010 (gmt 0)
The problem for me is that SMM just doesn't cover all the bases, whereas SEO is "neutral".
With traditional SEO it doesn't matter whether your website is about selling super cool mega widgets from outer space or building super niche little-heard-of micro widgets underground. The techniques to get your site to the top are pretty much the same.
SMM is really only oriented to certain business sectors a/o themes that people who sit around using FB or Twitter all day want to "like". IMO many real world non-mainstream businesses have no interest a/o no time to be involved in social notworking. It's just not universal.
Interesting debate anyway.