AMMDI is an open-notebook hypertext writing experiment, authored by Mike Travers aka mtraven. It's a work in progress and some parts are more polished than others. Comments welcome! More.
People are making personal digital gardens, which are roughly personal Wikis. There's a variety of tools being used, from Roam and similar graph-based PKMs to purely homegrown. These are very idiosyncratic (by design). They also suffer from a certain reception problem; outside users don't know how to read/navigate them.
Solutions
Garden/page registry
Garden (site) level: maintain a central registry of digital gardens, perhaps indexed by topic or other metadata, for findability
Some issues around topics, how do you decide two pages are about the same topic?
Scaling issues. Easy to imagine for a few hundered DGs, beyond that the usual issues emerge
Earlier notes
Level 0: just a simple dir, with some fields, and a form for people to submit
Level 1: Gather common pages and build page directories (like Twin Pages but maybe less of a hack)
Level 2: Let people curate the gardens they like, so login and user state
MetaGarden! I wonder if this centralization runs counter to the spirit of the thing
Way to monetize? Eh can't think of one. You could have some kind of pay-for-prominence scheme but that is dicey.