I’m a big fan of TiddlyWiki, the personal wiki that runs in one file in your browser, and I’m very impressed by all the plug-ins and tweaks that the program’s users are introducing. (I wrote about TiddlyWiki last year in a WSJ.com column — subscription only, sorry — but have also included some notes for the piece here in the blog, including on this page (scroll down).

Anyway, TiddlyWiki is a free form database, not unlike an outliner, but with lots of cool elements that make it much more. (Yes, tags, too.) Think of lots of individual notes that you make in your browser, which you can find via ordinary search or by tags you give to each note; you can also view a list of notes chronologically — i.e. in the order you created them — etc etc.

But if you’re a fan of mindmaps, or PersonalBrain, where your information can also be viewed graphically, you might feel a tad constrained. Not for much longer, if a Java programmer and writer called Dawn Ahukanna has her way. She’s just released a “hypergraph plug-in” which creates what she calls navigation graphs (I’d call them mindmaps but that’s me). As she says, “I’ve had quite a few revelations with it already, using it to map my existing TiddlyWikis.”

It’s an early prototype and not as pretty as it could be, but this kind of thing is in my mind the thin wedge of a revolution largely ignored by the “social” Web 2.0. Tools like TiddlyWiki, though presently a little rough around the edges and geeky, mark a very useful exploration of different interfaces for personal, portable data.

While I think of it, another interesting new TiddlyWiki modification is the MonkeyGTD (Getting Things Done, to the few people who haven’t been sucked in by the David Allen book and self-organizing philosophy), which tweaks the TiddlyWiki interface into little blocks.