Yes! A least instructions on how to build Energia for Linux.
I cloned the git repostory yesterday (400+ MB?!). Used Synaptic to install msp430-gcc v4.5.3. Ran "ant clean build run" in the build directory. Energia started (with support for all the Arduino platforms, not just the Launchpad). I loded the "Blink" example and hit Verify and got: