apache/libcloud — pull request #186 by jobelenus (2013-12-04 16:15:14+00:00)
Title: service type has changed for cloudFilesCDN

I am unsure if this change by CloudFiles is version specific. But I do know this is explicitly what is returned by version 2.0 (I don't have any 1.x versions). I happen to be using the IAD region as well.