This book was quite helpful
This is a good BPM blog by Dan Atwood and co
Andrejus has a good blog if you require lots of screen customization and plan to use ADF. There are many bpm cusomization/integration examples
Iam ur new to BPM 11g and if u don't know what is BPM why and where we use...
Please in google please type this "Building First BPM 11g application" then you will get how BPM is implemented with almost all activities been used . First do this exercise.. then you can certainly refer to urls give by Eon van Tonder
that are really helpful.
OK Muhammed ,
Why don't you try in Oracle BPM 184.108.40.206 Documentation in which you will have clear idea of each and every component and concept in detail...