Where did Batch scripts go? Nowhere, they now have a new avatar: Actions Wizard.
You might be looking for batch scripts in Acrobat X, and didn’t find it. Fear not, the functionality has not been removed. Acrobat X replaces Batch Scripts with the Actions Wizards. You can do almost everything you did with batch scripts, now without writing any code!
Action Wizards make it easier for you to to automate actions, and even easier for you and other users to run them.
See this episode on Adobe TV and rest assured.
Update: Thom Parker has written an excellent article on Acrobat X actions. You can see it here: