Big problem, though: Beaker (Dat) doesn’t store differences. And TiddlyWiki is one big file. So every time you save, it keeps the old one saved and the network starts to fill with these old copies. And you can easily have a 10 meg wiki—you get a hundred days of edits under your belt and you’ve created some trouble for yourself.
I went a different way with my tiddlywiki after trying the Beaker approach because of the way it handles versioning. When I tried hashbase.io, my little 2mb file was using 70mb of space on the server (and I was only getting started).