Free Dropbox Space - Am I Cheap or What?

I hate monthly bills, I just despise them. So the thought of paying a monthly fee to store my files with Dropbox frustrated me - no matter how much I appreciate the service. IB students are required to do written work - even in math. They turn their work in via Moodle and I return it via Dropbox in a shared folder. This had two results:

1. They will now have an digital portfolio of all their work.  
2. I got free space! 

So far 2/3's of the students have completed the necessary steps for me to get extra space! Not too shabby and cheaper than the Lifehacker solution.

If you haven't tried Dropbox and want to here's a link (wink wink) Dropbox.