I should have done this a long time ago but I didn't have the mental bandwidth to look into this and figure it out. I have now released the blog under a Creative Commons license.
It's worth checking out the Creative Commons site for more information about these licenses and how they work. Since I began my blog they seem to have added some helpful illustrative cartoons to help explain the licenses and what rights they do or do not reserve for authors. For my part I chose to allow the contents of my blog to be reused in a non-commercial context as long as attribution remains and any derivative works are released under the same license. A benefit to using a Creative Commons license is that people who want to use my work under those conditions can do so without needing to contact me to discuss it first. At the same time, none of my other rights that copyright law protects are compromised beyond what my license chooses to concede. Given that my purpose in blogging is to communicate with as wide an audience as possible to contribute to public discourse, I decided it was worth my while to not be heavy-handed in restraining all of the increasingly myriad rights U.S. copyright law affords.