Maryland is perhaps the most aggressive state in implementing a incubator -- based strategy for innovation. Here is a good article on one of the more recent incubators, the Rockville Innovation Center. Read more.
The Rockville Innovation Center opened this year with 23,000 ft.² on the fourth and fifth floors all of the Rockville Arts and Innovation Center. The center is located in the new Rockville Town Center, next to the library. The new Center is also part of a Business Incubation Network in Montgomery County. You can learn more about the network here.