Two things happened in the last twenty four hours which convinced me that the econ blogosphere is healthy and will keep on going strong at least my end of it. One is the outpouring of good arguments from all over (see for example here and here) against someone's rash statement that the econ blogosphere may be going the way of the used car market. As these comments made clear, there are sufficient incentives and reasons for the blogs to remain active and produce high quality content but perhaps in different forms (less frequent postings, joint blogs, greater use of aggregators).
And second, in my trip to Nottingham I was simply stunned by how many people reported reading my blog. Not only that, people actually remembered my posts some going quite a while back. With this kind of positive feedback, along with others like Not so incidentally, one of the unexpected scholarly benefits of having a blog is that it is like keeping an intellectual journal. You get an idea, you jot it down in your blog. Some months later, you vaguely remember having had the idea and you google your own blog to recover it. I am not kidding: I google my own blog all the time. And here is the evidence: the first third of my talk at Nottingham was based on a couple of blog posts from a few weeks back (this and this). So maybe that someone also over stated the bit about opportunity costs.