Cool, yeah Frederick has tons of options. The Common Market is pretty new and features all the stuff that you could ever want. From branded items to locally-grown produce, its super great. Their eggless egg salad is the best!
Haven't been to MOM yet. Was planning on going on Sunday but the BBQ went longer than expected. Apparently though its pretty nice.
As for restaurants--there is a great Ethiopian restaurant downtown(http://tinyurl.com/2cs5jw). I'm actually not sure how vegan some of the foods are, but they certainly have vegan options, since Ethiopia has many bean options. There is also a great Vietnamese restaurant as well (http://tinyurl.com/ytkxmq). I went there for my bday this year and it was amazing! She even made me a taro pudding which was vegan, since I told her that myself and my friend were vegans. Very hospitable, and very welcoming.