Hello there,
Just posted this article about how to recover a bootable EBS image
which won't boot:
http://blog.labix.org/2010/03/09/recovering-a-bootable-ebs-image
I hope it's useful to someone.
--
Gustavo Niemeyer
http://niemeyer.net
http://niemeyer.net/blog
http://niemeyer.net/identi.ca
http://niemeyer.net/twitter