Below is February 09 referring sites data and a couple of observations:

• February was not a usual month for this blog in term of traffic. At the begining of the month, my Tropicana’s poor re-branding post was picked by FastCompany and the blog recieved (and still continues to) large number of readers.
• As pointed out by the bloggers I mentioed above, social media services are becoming major traffic drivers in the overall mix of referring sites. Specifically in my blog’s case, StumbleUpon, Twitter, Ginx (a Twitter interface), Facebook and Outbrain appear high on the list. In addition, their positions improved compared to previous months.
• Users referred by social media services seems to be of “better quality” than users referred by Google. These users tend to spend more time and often read more than the specific page they land on. In addition, a smaller percentage of them, compared to users referred by search engines, hit the browser’s Back button immediately after seeing the landing page (bounce rate %).

I will keep following whether this trend continues to grow over time and post about it.