Amazon now allows IAM roles to be attached to existing EC2 instances
Just wanted to dash off a quick note. Amazon Web Services announced last week that you can now add IAM roles to your existing EC2 instances. This means you won’t have to recreate an instance in order to attach a role - now, you can use my tutorial on sending backups of your EC2-hosted data to S3 on instances you’ve already created, and not just new instances.