Thanks for the feedback, guys (io, Tito, willgrant, no one); it's really motivational.
I'll do what you guys say, WillGrant and no one, and start hitting my abs with some resistance. About five weeks ago, I started hitting calves hard as hell five days a week. They were like my abs: nonexistent. They're already starting to come in nicely. Hopefully my abs will follow suit. And yeah, haha, I'm in the 115-degree Arizona heat for a few weeks, so hopefully I eventually brown out some.