What a fool I was
Last night I was riding from my girlfriend's place back to my car and I had to stop at a stop light. My balance has been improving, so I figure I'll try to track stand until the light changes. I'm working on it, working on it....and then I realize that I'm actually doing it - a sustained, stable track stand. It was awesome.
...and it was about that time that I realized that my front wheel was jammed in a tire-width crack in the pavement, significantly helping my stability.