I would just use Google to search for Google Fiber
Honestly, I *think* it is ONLY available in Kansas City, Austin, and soon San Antonio. There may be a few more by now, but it is pretty limited.
The thing is, I'm in Austin, but it's not available in MY neighborhood (yet). And it sucks because it goes right up to the neighborhood adjacent to me.
And, I think they may do something odd like a large up-front cost to cover infrastructure, then lower monthly costs. But since it's not available to me, I haven't looked into the details.