Comment 3 for bug 499522

swap devices should be found and enabled with ec2-init 0.5.1 or greater.
This happens in 2 ways:
- if the ec2 metadata service provides data, it will be used
- if not, blkid is used to find devices with swap signature from partitions

I've verified that swap is enabled on ec2 i386 with in 20100126 with 0.5.1-0ubuntu1