I have created a ManageIQ appliance VM in the Ravello repo. Anyone with an RHCE can sign up for 1000 free hours per month in Ravello for personal testing purposes.
You can use this appliance to connect to ec2 directly. You can also deploy OpenStack in Ravello and connect the appliance to that.
For more information on free RHCE access to Ravello see: http://www.ravellosystems.com/go/rhce
The appliance is available at: http://www.ravellosystems.com/repo/vms/60590638
I plan on releasing a fully functional MIQ+oVirt+OpenStack environment in Ravello soon.