Richardson has added 3 great videos showing new features in CTP3. Please enjoy

Export customizations http://www.philiprichardson.org/screencasts/titan/ExportCustomizationsCTP3/ExportCustomizationsCTP3.html
Duplicate Detection http://www.philiprichardson.org/blog/post/Titan-Screencast-Add-Multiple-Users.aspx
Add multiple users http://www.philiprichardson.org/screencasts/titan/DuplicateDetectionCTP3/DuplicateDetectionCTP3.html
Import Data Wizard http://www.philiprichardson.org/screencasts/titan/WebImportCTP3/WebImportCTP3.html

Currently I'm enjoying the new ajax style lookup searches. Just type in your name of linked entity and hit enter and voila the record is now linked with each other (Simular like CTRL + K in outlook)