Initially the program ideas for this year's conference were rather limited, but they have started to fill up the schedule for this three-day affair. Among the topics that will be discussed at this Google-sponsored XDC include the status of X.Org 7.4, mobility support, suspend and resume support (or there the lack of), Mesa / Gallium3D technical overview, DRI2, TTM memory manager driver optimization, ATI R600 architectural overview, state-of-the-art Radeon driver overview, and WINE and X.
About 50~60 attendees are expected for the 2008 X Developers Conference. Among these attendees are all of the notable X.Org developers and other stakeholders, such as Daniel Stone, Alex Deucher, John Bridgman, Matthew Tippett, Adam Jackson, Keith Packard, Jerome Glisse, Zack Rusin, and others. ATI/AMD has three people at this conference (Deucher, Bridgman, and Tippett) from Canada while Andy Ritger seems to be the only NVIDIA representative in attendance. This is odd seeing as NVIDIA's Santa Clara offices are just a stone's throw away from Mountain View.
Unfortunately, we weren't able to make it out to this event, but when anything interesting occurs through monitoring the Wiki pages, IRC channels, or we hear it from one of the attendees, we'll be sure to pass it along. There's a possibility that AMD could be releasing additional code/documentation at this event.
More information on XDC 2008 can be found on its Wiki page.