3rd Party Repository for Dropbox

Setup key with:

sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 5044912E

Setup repository with:

 sudo sh -c 'echo "deb http://linux.dropbox.com/ubuntu/ natty main" >> /etc/apt/sources.list.d/dropbox.list' 

Setup package with:

sudo apt-get update 
sudo apt-get install nautilus-dropbox