Seems to be working nicely. It's indeed a drop-in replacement for Mozilla NLP plugin, just with the added ability to customize the endpoint.
If anybody else needs to check their NLP plugins, the My Location app can show location fixes individually per location source.
I'll start using the NeoStumbler app to contribute back to the API – hopefully it's well optimized and won't be eating too much battery.
Who were they talking to.
I blame whoever had their chat open at 1am.