I didn’t realize how much I used ScreenCloud until it broke when I upgraded to Ubuntu 13.10. I went looking for a fix and found some posts talking about installing a deb and running into SDL issues. That seemed like a bad path to try to follow so I went after the github and found this issue. The author has his own repo you can add to get the fixed / working version.

tl;dr
For xUbuntu 13.10 run the following as root:

echo 'deb http://download.opensuse.org/repositories/home:olav-st/xUbuntu_13.10/ /' >> /etc/apt/sources.list.d/screencloud.list 
apt-get update
apt-get install screencloud

You can add the repository key to apt like this:

wget http://download.opensuse.org/repositories/home:olav-st/xUbuntu_13.10/Release.key
apt-key add - < Release.key  

It’s probably worth mentioning I had to manually add the repo in the screencloud.list file. Your mileage may vary.