Merlin showed me Instiki and it looks great, works intuitively (using various text plugins instead of just typical wiki stuff), and the desktop Mac OS X one is the easiest to install wiki I’ve used. You download the disk image, double-click, and it’s running locally, accessible from the menu bar at all times.
Last week I got into the habit of launching it and using it instead of having a BBEdit todo.txt file on my desktop. As a private scratchpad, it’s absolutely fantastic. Over the past few days I’ve built out my ToDos into a pile of organized, hyperlinked pages that are useful to have around.
Now I wish I could mark some stuff as non-private/local and have it upstream to a public web server to share with others (like a “hey friends, check out these ideas for an upcoming trip” list I might have sitting here).