In just over a month, the American Society of Access Professionals will have their Chicago FOIA/Privacy Act Workshop. It's a 2.5 day training on all aspects of the FOIA - it runs from September 5-7. As a Co-chair of the event as well as a presenter, I believe its probably the best FOIA training you can get for the money. For more details see the ASAP registration page.
And the DOJ is holding a Best Practices Workshop on August 21. For more details see the DOJ announcement.