For about one and half month, I was very much involved with the WPF community on MSDN. At that time, I had around 50 visitors everyday, which to my standards is a pretty leap. If you look at the graph that compares the visitors, you notice a decent hike in the number of visitors.
Notice the region with highest number of visitors between October 2008 and December 2008 which was when I was very active on MSDN community. Then I stopped my activity since I went lazy and then my visitors dropped – which makes sense.
So fellow bloggers, if you want visitors, then be active on the community. My numbers are not high but at least they were doubled with my participation on MSDN community.