A high level view of application hosting from the cloud...

1. CDN Serving of Static Assets

2. Web Application Hosting in EC2

3. Web Services Hosting in EC2

4. Web Application and Services Hosting in ELB

5. SQL Serving in EC2 (ElasticCache/Memcache, MySQL, PostGres) or with RDS

6. NoSQL Serving in EC2 (Redis, Mongo, Riak, MySQL::Handler Socket), or with DynamoDB

I'll start wiki-fying.

Joshua