Ur/Web! That's something I haven't heard about in ages. Is it still in active development? In what circumstances are you using it? Fun, your own startup, is some secret big commercial user of it...?
I maintain my own private fork with some small modifications which I started polishing up this week to release it for a talk that I'm preparing.
The project I'm using this on is an ecommerce site [0] written in 100% Ur/Web with a hand-rolled backend ERP system written in PHP (not by me) which I am slowly replacing bits of with new Ur/Web code. As of today, we have 22223 lines of Ur/Web code, weighing in at 701 KiB.