These are the ec2-ami-tools, from
  http://aws.amazon.com/developertools/368

The upstream development for this package will take place in
  lp:~awstools-dev/ubuntu/<release>/ec2-ami-tools/<release>

For example, if the current release is 'natty':
  lp:~awstools-dev/ubuntu/natty/ec2-ami-tools/natty

There is a tool debian/upstream-check, and a debian/rules rule 'upstream-check'
that will crawl through the xml output and find the latest version of
ec2-ami-tools at http://s3.amazonaws.com/ec2-downloads/ .  It will print out
the highest version there, along with the modified date and the size.

For example:
  $ ./debian/rules upstream-check
  ec2-ami-tools-1.3-66634.zip	2011-03-10T18:17:14.000Z	137948

== Test ==
See debian/tests/README for more information.
