First, get yourself to the Dropbox website
and register yourself an account.
You can easily and instantly get a no-nonsense 2 GB account. The internet is great.
You'll then want to download the Dropbox client. Downloads for Mac OS X, Windows, and Ubuntu can be found on the Dropbox homepage.
My Eee runs Debian, but a quick trip to Google showed that, with the magic of free software, that was no problem at all. This site
has instructions on how to get the client for Debian.
Now that you've got the client, let's make some folders.