more on -
http://mashable.com/2011/11/30/social-profile-eye-tracking/
Hurray !!
It is now possible to use rhc-ctl-app -a appname -c add-alias --alias www.mydomain.com
and then in your DNS management for mydomain.com you can add a cname to point www.mydomain.com to app-namespace.rhcloud.com.