I am there.
Pete's Apizza (get it, pizza pizza) is opening at 1400 Irving Street NW, next to Potbelly and the Metro. They serve New Haven style pizza (aka apizza). If you've never had it, it's pretty delicious - thin and such.
Here are some pictures, DCist mentions it, and Don Rockwell's has a thread on the joint also.
UPDATE: I just called them to confirm, they open at 3 pm.