Since I started rescue work some 9 years ago, I am ALWAYS noticing cats everywhere. If I'm in my car and I see a cat (especially at night), I'll stop and call to them. If they run scared, I try to put food near where they went. The sign of a true rescue person is food, water and a carrier in the car at all times and TONS of cat related bumper stickers. At least that's what MY car looks like.

Ah, welcome to the wonderful world of rescue.