I haven't gotten around to checking anything yet, but today it was really acting up. It started misbehaving while I was actually driving. It seemed to calm down when I pushed on the accelerator, or maybe it was just a brief thing. I'm not really sure.
I am definitely starting to believe that it is something electrical, however. The dashboard lights came on as in the past, and the radio cut out. Today, I happened to be listening to a CD when it happened, and, when the radio came back on, it started playing a different track than I was listening to when it malfunctioned. Also, the RPM gauge was jumpy. All of this happens in probably 30-45 seconds each time.
I may have to bite the bullet, and take it into a shop. I curious to see what you all think, though.