Yep, I had to do exactly this here in Austin. I literally went door to door, met many of my neighbors for the first time, and mentioned that we were only a few signatures away from fiber in our neighborhood. Even after getting all of the signatures we have to wait until June for our install, which kind of sucks, but it's better than continuing to deal with Time Warner.

You went around collecting literal signatures, or got your neighbors to enter addresses on fiber.google.com?

I'm in Nashville and willing to do a fair bit of legwork if it means it'll bump my neighborhood up on the install list.

One could use lob.com to send postcards to everyone in their neighborhood about why they should sign up with that link...

People seem to immediately throw away anything that looks like promotional material, but maybe it's just me or maybe I wasn't mailing them something they found interesting. However, I'm pretty sure a handwritten note to your neighbors would go a lot farther.