One of the biggest issue I have faced with GAE cloud offering from Google is that it cannot handle naked domains.
It can handle subdomains www however not naked domains. This is a BIG problem, in that your app will not be able to handle PATH or Subdirectory from client request as it is stripped off during a DNS forward to a www subdomain for example.
So my question is, can Openshift handle naked domains? In that, a PATH or Subdirectory from client request would not be lost in translation.