[ec2] Can't contact instance

[Tom Haddon]

Hi Folks,

I'm getting a very strange issue with a particular AMI I've created.
It's a x86_64 image, and I'm using the stock Ubuntu AKI/ARI
(aki-6f709706/ari-61709708). I start an instance of my AMI and get the
following console output:

http://paste.ubuntu.com/246739/

I can't login to the instance, or contact it via ping, even though:

http://paste.ubuntu.com/246741/

Any ideas what could be going on? From what I can see of the console
output the machine has booted okay, but then I just can't contact it at
all...

Thanks, Tom