We have uploaded refreshed and new slide sets:
Upgrade and Migration to Oracle Database 11.2
Oracle Database 11.2 New Features Overview
Behaviour Changes between Oracle 8i and Oracle 11.2
Please note: This is not a 100% complete summary but it will give you a rough overview about parameter and dictionary changes from release to release plus a summary of documented behaviour changes. Sources were the release notes, the documentation, MOS notes and some others.