Discussion on this over at MF.
Apparently, it's some sort of gradual roll out from BofA, was supposed to start on the 6th of this month. Couple of states were identified as potentially being the first to participate -- Georgia and Pennsylvania. I checked my BofA account earlier today, Colorado is apparently not in the first wave roll out.
One of the posters over there said that, for their account, they had to access via one of the tabs at the top of the screen, "Tools and Investing" and there was a prompt there to get free FICO score.