The ever-popular southeast USA hub in Atlanta (AtlantaNAP) is in the process of changing hands.
GNAX seems to have a quite a big build out in Atlanta http://gnax.net/data_centers/atlantanap.html. They also operate in Dallas, Texas.
The buyer of AtlantaNAP is reported to be...
So Dallas, Texas, colo facility CoreXchange has been sold to Zayo Group which owns AboveNet most notably. See: http://www.zayo.com/news/
CoreXchange has been a popular colo facility for many bargain priced resellers and offered reasonable dedicated server rentals directly.