I second this :
Happy 10th Anniversary to the Smallest Federated Wiki! Congratulations Ward Cunningham! And thanks as well to Mike Caulfield and all those who’ve worked on, iterated, and expanded on its foundations since.
Smallest Federated Wiki is yet another great intuitive idea from Ward Cunningham. Ward is always doing stuff that seems simultaneously low-key and unobtrusive, that you later realize to be both brilliant, and phenomenally useful, after you’ve had long enough to think about it.
This is a delightful combination of qualities.