Recently, the trend of creating UGC platforms - http://www.ning.com/ and http://www.drupal.org/ for example - are becoming more and more popular. This is taking social media and networking to another level.
It's not just one-upping blogging , but even group moderating, as social media geeks are now directing instead of just acting. Meaning, if you were so inclined to create, moderate, and manage a LinkedIn group, you can now take it up a notch and manage an entire social network.
I feel this brings up the evolving question of quality content, as noted here: http://is.gd/4rYL. With this deluge of information, even in the nichiest of niche areas, is there such a thing as too much? I myself have subscribed to a number of networking sites, a combination of social and professional, and while there are maybe a dozen or so, I can only actively maintain a few. I - like you should be doing as you market yourself in this frontier - offer my opinions and share links, resources, thoughts, and the like - as much as I can. When I'm unable to be active in these communities, I worry that I'm spreading myself too thin.
I also worry that with so many sites the overall quality of information will suffer. The aforementioned UGC sites will undoubtedly multiply the number of web sites exponentially. I hope content doesn't suffer exponentially as well.
Please bear this in mind as you post, tweet, and register out there in 2.0Land.