1. Amazon EC2
   1. Hadoop Core
      1. Hadoop
         1. Lucene
   2. HBase
   3. HDFS (Hadoop Distrbuted File System)
2. Google App Engine
   1. MapReduce
   2. BigTable
   3. GFS
3. Windows Azure Platform
   1. Topic
      1. Windows Azure Fabric
   2. Topic
   3. Topic
   4. Live Services