I hope this is okay since I would like to get some extra free space (and give the person signing up some extra free space as well). By using the referral address, both Dropbox users get an extra 250MB on top of the free 2GB.
https://www.dropbox.com/referrals/NTIxNzk2NTk5
Only 9 referrals left!
https://www.dropbox.com/referrals/NTIxNzk2NTk5
Only 9 referrals left!