If you recall, the first location is at Georgia and Fairmont, and also features a small dining room. I've heard nothing but good reviews and my friend who lives nearby is a big fan -- he says he goes maybe once a week. I've tried a few samples when then opened and thoroughly enjoyed them. Yelpers agree, giving then an average of 4 stars on almost 140 reviews -- a pretty great showing.
The new Salt and Pepper II has an even better rating, 4.5 stars from 10 reviews. Sounds like I'll have to check them out.
Here's the website and menu for the Georgia Avenue location. I don't yet have one for the new location, but their number is (202) 723-0404.