Welcome to the Saverocity Forum!
In April 2013, I went to the FTU in DC. I did not find it useful, but it depends on your knowledge. When I went, I probably had about 5 to 6 months of serious knowledge of the miles & points. The big weakness (and still is) is on the redemption side. When I went, and a lot of things can change between then and now (like the Advanced sessions), it was way too beginner level. It was a serious credit card pushing seminar.
From what I understand also, there'll be a lot of concurrent speakers so you could pick and choose the seminar you wish to attend that would suit your needs