Up for sale today is an excellent one-word hosting related domain. Colocation servers have become a huge part of the hosting industry today. This name is easy to remember, and would be great with some development!
Registered with DynaDot
Expires in 05/2017
According to Google there are about 19,700,000 Google results for: Colocation
This term is taken in pretty much every major extension, along with many of the new gTLD extensions including:
COM/NET/ORG/IN/ME/CO/CA/US/NEWS/XYZ/TOP/VIP/CC/INFO to name a few!