A number of upcoming conferences have released their programs to help you decide whether to go and what to see when you get there:
The IDSA National Conference - Polar Opposites (Sept 10-13, Arizona) features a range of topics. For the design research crowd there's: People Can't Tell You What They Want and Nine Other Design Research Myths
Chris Rockwell, IDSA, founder and president, Lextant.
The line-up for the Design Research Conference (Sept 19-20, Chicago) looks pretty much completed, although the order of speakers has yet to be determined. Some of the workshops are already filled up.
The Human Factors & Ergonomics Society (Sept 22-26, New York) program is not easy to navigate (go figure). It's a very large conference so you can search by day or category, but there's no easy way to browse through all the sessions to see what's of interest. You can search with Technical Groups - for example there's about a dozen or so presentations related to Product Design, ranging from "Sensory Quality Evaluation of Clothes Washing Machine Selector Knobs" to "The Boeing 787 Dreamliner --- A Case Study in Large-Scale Design Integration".
And last, but not least, EPIC 2008 (Oct 15-18, Copenhagen). You'll need to click through each section to see the content offerings.
I'll be at the Design Research Conference and at least part of HFES, if anyone would like to meet-up and say hi.