I was checking out Spirit Voyage Music, a distributor of sacred music (some would call it New Age), and I realized that they are located in northern Virginia, in Purcellville. They are strong on Kundalini, but have lots of other world music styles. They also have a ticket outlet for concerts.
I followed a link to the blog of one of the employees, Hargobind, and discovered that I had just missed a concert of Dave Stringer, one of my favorite kirtan musicians, at Willow Street Yoga on September 15. I will have to add this to my blog roll and ping it frequently because he will probably be in the know of other concerts in the DC area.