Update README

README.md

@@ -4,8 +4,42 @@
 * IRC: `#terraform-tool` on Freenode
 * Mailing list: [Google Groups](http://groups.google.com/group/terraform-tool)
 
-Terraform is a tool for building and changing infrastructure
+Terraform is a tool for building, changing, and versioning infrastructure
-safely and efficiently.
+safely and efficiently. Terraform can manage existing and popular service
+providers as well as custom in-house solutions.
+
+The key features of Terraform are:
+
+* **Infrastructure as Code**: Infrastructure is described using a high-level
+  configuration syntax. This allows a blueprint of your datacenter to be
+  versioned and treated as you would any other code. Additionally,
+  infrastructure can be shared and re-used.
+
+* **Execution Plans**: Terraform has a "planning" step where it generates
+  an _execution plan_. The execution plan shows what Terraform will do when
+  you call apply. This lets you avoid any surprises when Terraform
+  manipulates infrastructure.
+
+* **Resource Graph**: Terraform builds a graph of all your resources,
+  and parallelizes the creation and modification of any non-dependent
+  resources. Because of this, Terraform builds infrastructure as efficiently
+  as possible, and operators get insight into dependencies in their
+  infrastructure.
+
+* **Change Automation**: Complex changesets can be applied to
+  your infrastructure with minimal human interaction.
+  With the previously mentioned execution
+  plan and resource graph, you know exactly what Terraform will change
+  and in what order, avoiding many possible human errors.
+
+For more information, see the
+[introduction section](http://www.terraform.io/intro)
+of the Terraform website.
+
+## Getting Started & Documentation
+
+All documentation is available on the
+[Terraform website](http://www.terraform.io).
 
 ## Developing Terraform