Since I was one of the alfa-testers, I was able to develop a deployment concept for linux servers which permits to deploy BitTorrent Sync as single or multiple daemons with specific configurations. There are now ready-to-use deb packages available both for Ubuntu or Debian with full debconf-support for automated creation of an optional default configuration. If you are searching for a version more suitable for personal desktop use, please look here. Update: User @tuxpoldo has opened a repository, and keeps it current. Follow those instructions instead!
#INSTALLATION IN UBUNTU
Currently there are packages available for Ubuntu precise, quantal, raring and saucy supporting both i386 and amd64. The packages can be easily installed by adding the PPA and then installing as usual:
sudo add-apt-repository ppa:tuxpoldo/btsync
sudo apt-get update
sudo apt-get instal