I've been advocating for years for someone to create a hypertext notepad (see notespace), but it seemed that my pleas for such a simple program were falling on deaf ears--or at least ears that were busy with other things.
VoodooPad, which is exactly what I was hoping for. You're presented with a straightforward, bare bones note pad interface, but you can type a bit of text, click on a 'link' button, and you've got a new page, automatically linked from the first one. Like a wiki, except without the clunkiness of the web interface.
If that wasn't cool enough (yes, it's dead simple, but no one did it for so long!), it appears to be capable of exporting any collection of hypertext pages as html, xml, word, or whatever, and even promises to get along with actual wikis.
Now, whenever I come across a scrap of text that I want to store, I don't have to create a new file (cumbersome), post it to the weblog (slow), or use stickies (argh!)... I can just type a title into VoodooPad, click on 'link', and paste.
A new level of fulfillment of my personal hypertext needs has arrived. Now, if I can avoid reading about politics for a few more hours, it'll be a great day.
Update: in my giddy enthusiasm, I didn't even notice that VoodooPad can interface directly with VPWiki (a wiki set up to be used with VP), and it plays well with the MacOS X file system: drag a file or folder onto the pad, and it creates a link that opens that file. Excuse me while my mind explodes while contemplating the massive expanse of things that were possible to do before, but never so obviously easy.