Thanks to the guy at Auto Zone who did the free "check engine light" test on my car by hooking up the machine and telling me what my car's computer has to say.
Seems to be that the Service Engine Soon light (see previous post) was related to emissions, or something funky with my gas cap, or perhaps leaving my car running while I fuel, which I haven't done in like 2 months. But the good news is, he reset it and the damn light is gone. It was starting to really piss me off. YEAH for AUTO ZONE!