The bike-mystery I wrote about in the other thread reached a happy but embarrassing ending.
Like I suspected, someone assumed the bike was abandoned, so they took it and fixed it up (The back tire was flat and has been all summer. I didn't have the skillzors to fix it and all my friends who do have been too busy to help me, which is why people might come to the conclusion the bike is abandoned)
I'll get it back, and I'll compensate for the replaced tire and stuff.
It's really embarrassing, but at least it's all finally cleared up.