Update 8/5/2013:
I have decided not to pursue converting Blesta to Bootstrap for a few reasons, 1 every update I would have to rebuild every page, and plug pages. It's just too much to maintain. Also, I have very little time to work on it these days, and then they just released bootstrap 3 so..
All that being said I have about 90% of my integration finished. I modified the structure.pdt quite a bit so that in the future with updates I can reupload the structure and get back to the exact integration as before. Their are some pretty cool things, like if logged in this menu, if not that menu. Unfortunately I have not made it a 100% match from my static template as I would like but for now that is okay. I will be working on it more in the future.
Compare Blesta -> http://dev.memoryx2.com/members/client/login/
To my static Template -> http://dev.memoryx2.com/