There's now a linux branch that has been tested to work with Ubuntu 14.04.
The only features that will be missing from this branch (as far as I've tested so far) are Windows Forms features (including the Map Editor) and the High Performance benchmark utility (which uses windows Kernel32.dll).
Check it out! Test it out!
https://github.com/ZFGCCP/kot-mono/tree/master(edited branch name to master now that linux branch no longer exists as it is merged to master already)
If you have questions regarding the setup, let us know and we'll try to help out. The most important part is setting up MonoDevelop and MonoGame and their dependencies properly.