1. MapReduce
2. Ebay Data Warehouseshttp://www.dbms2.com/2009/04/30/ebays-two-enormous-data-warehouses/
3. Facebook Hadoop and Hivehttp://www.dbms2.com/2009/05/11/facebook-hadoop-and-hive/
4. Facebookhttp://developers.facebook.com/
5. MySpacehttp://wiki.developer.myspace.com/index.php?title=Main_Page