Looks like it was introduced at the end of April, from initial glance it looks like you would still be limited in terms of the annual contribution limit, so this would only help if you weren't hitting your max roth limit each year already - but probably worth it to keep an eye out in case it does go through with some amendments - could become another tax shelter to take advantage of (ala HSA)
http://www.burr.senate.gov/imo/media/doc/boost%20saving%20for%20college%20act.pdf
