Is there a good solution for getting the code onto a chip? Last time I tried with the open source GCC stack, I eventually gave up and installed the painfully large (~1GB) IDE from TI.
I don't know if I would call it "good" but if you're willing to settle for "official" there is http://www.ti.com/tool/MSP430-FLASHER which will work with TI's own MSP-FET on all three major OSs.
Accepts a .hex so you can use whatever toolchain you want.
