I'm on Alissa Cohen's mailing list, and I just got an email from her explaining that she's closing both restaurants. Basically, she explains that she's burned out from the business (I'm not surprised), and decided that the insane hours and stress were getting to her.
Not clear as to whether they are still open - the website is still there, though.
I never did get a chance to eat at either locations. :-( On the plus side, though, she has another book that's coming out in October, and she's including Grezzo recipes.
69 Prince St, Boston, MA 02113