So it turns out I need an EBS backed AMI for an AWS usecase. I just looked at what EBS was from here:
http://aws.typepad.com/aws/2009/12/new-amazon-ec2-feature-boot-from-elastic-block-store.html
Is that an option we have with the current tool chain?
Currently BoxGrinder only supports backed type os images. There is a BGBUILD-3 issue for that. Feel free to watch it.
--Marek