your welcome...here some sites that I use

http://www.appsdba.com --> good scripts here and check out the reference link for some great sites.
http://www.oaug.com/ --> join the excellent DBA listserver here. You may get alot of mails, but if you have a lot of questions about APPS DBA stuff, chances are they will be answered here.
http://www.geocities.com/SiliconValley/Network/9828/
http://docs.oracle.com/index.html

Regards,

Dave.