The Red Hook mesh is not related to meshnet (meshnet is a reddit.com/r/darknetplan intitiave from the beginning).
This one was developed directly with the community from the beginning, and it is still growing today. The city now funds Digital Stewards (local residents who learn about mesh networking) to expand and maintain their own network.
Edited to clarify. Yesterday's Chicago mesh thread prompted a search that didn't turn up much besides darknet/meshnet which is why I posted it. I'm glad to see this update though– when I saw the title I was a little bit worried that it was going to be a project postmortem. (I was only tenuously aware of the project beforehand, but seeing the OTI affiliation made it much more clear.)