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
   2. Topic
   3. Topic
   4. Live Services