Some users prefer testing features right after implementation and announcing. So this issue for them.
Actually there is no problem to compile sK1 package under Linux. Especially for Ubuntu. Just download latest source code from sK1 repository (how to fetch code read here), install required packages and run commands described in README.txt file. Finally you will get package specific for you system.
For lazy testers we start providing ready packages for Ubuntu 14.04 LTS 64bit. Ubuntu version is defined by our default development platform. We cannot support more systems because switching between different OS’es takes a lot of time or requires special continuous integration servers. Also Windows snapshots take a lot of disk space on project web server. So on this moment there are packages for default development platform only.