A few weeks ago, I blogged about Bing and how it had broken into the top 5 referrers of traffic to this blog. Today, I am happy to report StumbleUpon has entered that space too.

A few weeks ago, as a result of a former Ning colleague joining the ranks of StumbleUpon (SU, among friends), I decided to give it a shot again. I installed the extension to help me stumble upon pages as I visit them.

So far this month, I am seeing SU behind approx. 5% of the traffic to my blog. Are you seeing anything like this?