When I was in Boston two years ago, the Tea Party was out of business. Has it re-opened? There was an old notice (about two-three months, from the looks of it) apologizing for the inconvenience, and a look of dereliction about the place, indicating no hope of reopening soon.
The U.S.S. Constitution is still there, I believe, and worth a visit. We couldn't make it during our short trip, but it was worthwhile.
The Plimoth Plantation and the Mayflower II are not too far away to the south, and worth the trip, IMHO.
I think Annette has photos from her visit of around the same time as I was there posted on the forum.
Quod scripsi, scripsi.