Good Reasons for an Academic to Blog?

Anne at Purse Lip Square Jaw posted an incredibly insightful piece today - citing work by Melissa Gregg - regarding the motives behind the proliferation of graduate-student and junior-faculty blogs. It knew more about why I started this blog than I did, I think. A very worthwhile post to check out, and I look forward to following up with more of Gregg's research... but maybe after I file.