This question came up in today's podcast. 

I thought I'd try casting a net to see if we can get any information by asking people who live in Manhattan if they have FIOS.  

If you do, please post a comment below, saying where you live. Not the exact street address if you don't want to share it. Something like "86th and Broadway." 

It also struck me that an app like Foursquare might be able to help gather this kind of information.  

My guess is that there is little or no FIOS in Manhattan. 

Also, please pass on pointers to this post to help gather the info.