Guys...just came across this site SCRIBD where you can upload docs yourself or search for some reference docs.
I came across this site while reading LewisC blog http://blogs.ittoolbox.com/oracle/guide
Lewis Cunningham is an Oracle Ace, author of EnterpriseDB: The Definitive Guide and a Database Architect. I have been following his blogging on ITTOOLBOX very religiously. He definetely has good inputs on Oracle which are very helpfull.