Task Flow Best Practices - Video from ADF TV's Frank Nimphius on development best practices concerning Task Flows
Enterprise vs Application Roles - Good explanation on the differences
Building Ueser Interfaces - MUST SEE - From ADF Insider, Lynn Munsinger explains layouts.
ADF Security set up. OAM and Web Gate - Good information about ADF Security
ADF Security part 2 - Shows deploying app with adf security built in.
ADF Security Part 1 - Shows steps the deploy app that uses ADF Security
ADF Security - Overview - From Frank N. Oracle ADF Product manager