Noticed that the Cambridge Four Burgers has started serving breakfast daily 7-11 a.m. There's a little bit about it on Twitter and Facebook but haven't seen other mentions.
An assortment of egg sandwiches, oatmeal, OJ, hash browns, filter coffee from Barismo. One egg sandwiches are $6.50, which seems good to me given the premium locally sourced ingredients (eg. turkey breakfast sausage made in house from Misty Knoll turkey.) A dollar for an extra egg.
So far I've tried two of the more basic sandwiches : The Local (bacon egg and cheese with hash browns) and the Sage Turkey Sausage. Both excellent.