water cooler :: tiddlywiki
There are a couple of "flavors" available out there and I've been using the gtd-tiddly to keep track of my to-do lists. It prints each "page" directly to 3x5 note cards, too!
but it seems like latest tiddlywiki version is not working properly in DSL's default firefox version 1.0.6 (seems to be a few macro errors. will report those in tiddlywiki group)