I'd read about dropbox a while ago and didn't think too much of it. There are getting to be more and more services that will allow you to use their disk space, and synchronize it to all the computers you specify. Dropbox didn't seem to offer as much as Windows Live Mesh but I gave it a shot anyway.
My first reaction was that the Dropbox synch was way faster than Mesh. Dropbox also keeps a history of what has happened, and shows you what is happening at any given time. Mesh does not. In fact, the only thing Mesh can give you is remote desktop access to any other computer in your mesh, which is interesting and helpful.
I was getting ready to uninstall both Mesh and Dropbox, then I read Joel's post on password management. I've been using my thumbdrive and a portable version of Keepass to store my passwords. As Joel suggested, I could keep my password file in my dropbox and use the installed version of Keepass. This way I add a new password, and I can access it from home too.
I then took things a step further and copied the Keepass exe to my dropbox. Now I don't need to install anything except the dropbox program and I have instant access to all my password from all my computers. Very cool. I essentially turned my 2 GB dopbox space into a 2GB thumbdrive that I don't have to carry with me.