I got interested in the BSL bootloader about 6 weeks ago whilst trying to find a programming solution for a product at my work.
I have done a bit of research and written it up as a 2 part post on my blog:
Part 1 http://sustburbia.blogspot.co.uk/2016/02/the-great-msp430-bootloader-swindle.html
Part 2 http://sustburbia.blogspot.co.uk/2016/03/the-great-msp430-bootloader-swindle.html
If you want to program an MSP430 but don't want to have to use a FET based device, then this could be what you are looking for.
My programmer? Sure - that's it on the left hand end of my ChipStick board - costs about $1.
Ken