RSS 
GTD Tiddly Wiki is amazing. I had been looking to put Tomboy on my USB stick, but that wasn't looking like it would work (the windows port isn't... done?) and then I remembered this project I'd read about a while ago and looked it up. It's a Wiki, written entirely in JavaScript and Ajax. But most importantly and amazingly, it's portable. You just drop the one 120kb (empty, more if you go with the defaults) on a Usb stick and open it in a web browser. You can edit it like a regular Wiki (nicer, cooler, and better interface I might add) and then when you're done it saves the data to it's own file and is ready to go. Close the browser and then open it later else where and you're right where you left off. This app/script/web page is an amazing example of JavaScript and Ajax. One of the best I think. And it's amazingly useful. I know have a portable Wiki on my USB stick. Serious kudos.
Also, I just got Gaim working off my USB stick. Installed portable Gaim and a few plugins, and ASpell. It all works. Gaim encryption, spell check. I was also shows how to get port forwarding/proxying setup with putty, so I can use MSN with Gaim. Before you connect to your ssh server, just goto the 'keys' section of the options menu, and setup a source port of whatever (8080 for example) and then set it to dynamic and ipv4 and hit the 'add' button and that's it. Connect as you normally would. Leave it open, the go into your app (in this case Gaim) and set it for a SOCKS5 proxy on local host on what ever port you setup (8080). That's it. Most ssh servers are setup automatically to handle this and now I can use MSN with Gaim from school. Rock.
