Turns out there is a really easy way to mount your box.net account. Go to Places \ Connect to Server:

You will be presented with this dialog:

For the User Name, enter your own username. Don’t use my username. For Server, enter www.box.net/dav

You can put whatever you want for the “Name to use for connection” textbox. That is the name that will appear on the desktop icon:

Double-click the icon, and you will be presented with an authentication dialog box asking you to login:

I chose to remember my password, because I dislike typing it over and over. That part is really up to you.

You should now be able to access your account.

Tested on: Ubuntu Dapper, Ubuntu Edgy Eft