Thanks for the tips, Hounds! Regina won the day: it turns out it doesn't travel too badly. Dining-In actually hit our delivery window, a little early, even. (And yes, I shun Upper Crust.)
I'm assuming you'd want to avoid them but upper crust delivers. I used to work a few blocks from govt center (opposite side of park street) and many work functions would use delivered UC pizza.
We've used Viga and Alfredo's (South Boston) and both deliver to Tufts medical so i think they would to DTX as well. Also, very close to you is New York Pizze. None of them gourmet but decent.