I have started Peerbox testing repository which will serve as testing ground for future versions.
Install procedure is almost the same, after installing the Raspbian:
wget -O - http://peerbox.me/test-repo/peerbox.gpg.key | sudo apt-key add -sudo sh -c "echo 'deb http://peerbox.me/test-repo jessie main' >> /etc/apt/sources.list"
sudo apt-get update && sudo apt-get install peerbox
To move from standard to test repository, edit the /etc/apt/sources.list file manually. Replace “peerbox.me/repo” with “peerbox.me/test-repo”.
After that do
sudo apt-get update && sudo apt-get upgrade