I attended - and enjoyed it very much. Definitely met a lot of cool new people. And a great place to meet potential interns and review portfolios. Airfare, taxis, hotels, etc. add up fast. But looking back on this and past conferences, it has been well worth it.
There were a couple that I found especially helpful: Ken Musgrave's presentation about Dell's Experience Design Group, and Sam Lucente's Design Value Matrix. I also really like the ID cards from Loughborough University.
The only thing that is disappointing is that I can't attend all of the presentations that are occurring simultaneously. I wish there were two or three of me