It took more time away from client work than I had planned, but it did "ship" in time to enter Mozilla's Dev Derby.
Try the demo entry
Still waiting to see how the judges liked it and nervous that its unique editing interface was a big strike against it as a casual demo. Still needs some visual and touch size improvements to the vector editing. No feature sketch mode. Needs a better solution for caching the map tile set(s) separate from the app. Doesn't yet show your current location. CouchDB sync code commented out. Etc. Etc.
However, a number of features that weren't in the original early editing platform are now there: you can name each shape (or actually enter custom JSON), pick colors, choose from a handful of basemap options, delete unwanted documents, etc. And of course, the first pass at an offline mobile-friendlier interface.