Updated with links

Author: aaronkao

README.md

@@ -3,7 +3,7 @@
 ## All Labs must be performed in us-west-2 (Oregon)
 
 ## Overview
-This workshop has several lab exercises that you can complete to extend the functionality of the base chat app that is provided when you launch the CloudFormation template provided. Each of these labs is an independent section and you may choose to do some or all of them.
+The [Zombie Microservices Workshop](http://aws.amazon.com/events/zombie-microservices-roadshow/) introduces the basics of building serverless microservices using [AWS Lambda](http://aws.amazon.com/lambda/), Amazon API Gateway, Amazon DynamoDB, and other AWS services. This workshop has several lab exercises that you can complete to extend the functionality of the base chat app that is provided when you launch the CloudFormation template provided. Each of these labs is an independent section and you may choose to do some or all of them.
 *   **Typing Indicator**  
     This exercise already has the UI and backend implemented, and focuses on how to setup the API Gateway to provide a RESTful endpoint.
 *   **SMS Integration with Twilio**