For those who have been following this blog for a long time, or who have just stumbled upon it via a Google search, you may want to know that this blog has found a new home, bradlittlejohn.com.  From now on, any new posts will appear there, not here, and I am also gradually migrating the archives from this blog—or rather, the best posts that are still worth reading—to the blog there.  However, you will also find there a constantly-updated index to stuff that I'm publishing elsewhere, whether journal articles and such or online articles on other blogs.  

Thanks to all those who have faithfully followed this blog for the last 4+ years; you've been a fantastic audience!