If foo is a google appengine app that can be accessed at both foo.appspot.com and www.mydomain.com
How do I get various publishers to be able to access this by pointing foo.theirdomain.com to theirdomain.mydomain.com or theirdomain.foo.appsopt.com.
One way is - theirdomain needs to setup a google apps account - and than install my app - and than specifically note that it can be accessed at url foo.theirdomain.com - and in their domain manager have foo.theirdomain.com point to ghs.google.com
What about domains that "do not have" a google apps account. How would they be able to get foo.theirdomain.com to point to either theirdomain.mydomain.com or theirdomain.foo.appspot.com