Yes, I'm going to post to Discussion, but I wanted to test the waters in an Open Thread first.

I would also like to see that sort of thing circulated around survey time at the end of this year

Good idea. I'll see what I can do about that.

it's conceivable to me that ZeeMaps is not the only service like this

ZeeMaps is the one I know. I did check AlternativeTo, but haven't found anything promising so I just went with ZeeMaps. It's possible to export the data if someone comes up with a better alternative.