Here is another Openstack question we see quite a bit of:
"Image is getting created. But when I launch instance I am not able to Login to the instance .Can you tell me what is default username and password for ubuntu-12.04.2-server?"
So here is the situation....the image does not have password login enabled. You will need to generate a keypair, boot with it, then 'ssh -i key firstname.lastname@example.org'