Portable Dropbox and Multiple Accounts

Here's a great portable app that lets you run Dropbox locally, and also lets you run more than one instance, so for example you could have a project based Dropbox and a personal based one.  I know you can use selective sync or sharing but you're never quite sure whats being shared and synced so this could be a good way to keep things segregated.  Each account comes with 2Gb free too of course. Get the software here, get a free account here.