For Acton's annual conference, "Acton University" -- which is economics and Catholic social teaching for beginners. When I met the folks at Acton in Rome, this was highly recommended to me. However, it just didn't work out for this year. Next year, maybe. God willing.
[Well, I've been to Grand Rapids. Twice no less. During my stint with the CSPs. It's a neat enough place.]
Link to mp3s of the various lectures.
Bloggers covering the meet.