Vace is now delivering pizza and sandwiches via diningin.com. I believe you must put your order in by 8:30pm, since they close at 9:00. I ordered last night and it arrived hot and in top form. Vace has always been my favorite large pie in DC. The sauce has an excellent flavor, the crust is chewy and crispy all at once, and they use excellent toppings (especially the olives).
I don't usually use the pay-for-delivery services (like A La Carte or Dining In), since there are so many places that deliver for free in DC. But in this case, it's an excellent option, since picking up from Vace usually entails the hassle of illegal parking or toting pizza home on the bus/metro.