Cool article. Our office is down the street from the American Underground and I'm down there fairly regularly. The space is definitely starting to gain quite a bit of traction and is getting to be a popular location for small teams that need a starter office. The Underground's growth is probably due to the growth of the Durham entrepreneurial community in general. There has been a lot of startup activity in the area over the past couple of years and it doesn't show any signs of slowing.

I'd love to see Durham get a co-working space of some sort (something I've heard is in works), which might be a way for even smaller teams to meet other people and work together.