Tags and Management Features

Amazon is gradually adding features that enterprises need to manage their infrastructure. Amazon now allows you to tag the majority of Amazon EC2 resources:
    EC2 instances
    Amazon Machine Images (AMIs)
    EBS volumes
    EBS snapshots
    Spot Requests
    Amazon VPC resources such as VPCs, subnets, connections, and gateways.
You can tag existing resources and tag new resources when you create them. As well as identifying a resource with a meaningful name resources can be identified as, for example, production and test resources.

EC2Dream GUI supports:
  Creating tags for new or existing resources
  Filtering based on tags
  Specifying a user-defined tag as a nickname for a resource.

See Using Resource Tags in EC2Dream for more details.

Combine EC2Dream with the Chef configuration system and Git source control management for a complete open source management environment for EC2 compatible clouds.

Amazon are targeting the enterprise market so they are adding management features.
They have already annouced User managment. The ability to specify multiple users and the access each user has to the Amazon features all billed to the same billing address.

Other area of management that I predict are:
Version Management - S3 Data service already supports versioning.
Deployment - Automatic deployment of Java, PHP code.
Script Management - Maybe the ability to run Chef scripts.
Improved Monitoring - Maybe Nagios support to extend the current Cloudwatch monitoring.
AutoScaling - Extra Autoscaling features like scaling by time of day.

They are also beefing the API up so it can be used by orchestration tools that big enterprises already use in their data centres. For example Idempotent instance creation

References:
Using Resource Tags in EC2Dream
Resource Tagging
Filtering