DNS for service namespacing?

I was chatting with Dale in the hallway about service management, which happens to be related to his latest post regarding service discovery.  Something that crosses my scattered brain from time to time is whether it would be feasible to use DNS namespacing to facilitate service management.  In the same way that the .Net libraries are well specified via namespacing, wouldn't it make sense to manage the service directory the same way?  If I knew that I could always go to http://microsoft.it.crm.customer to find the latest services related to customer management, wouldn't that facilitate discovery and re-use within an enterprise?...