The WebSphere Users' Group will have a presentation on WebSphere XD on July 31, 2007 in Research Triangle Park, NC, USA.
The presentation, "Wow! WebSphere Can Do That?," will most likely be given by one of the members of the WebSphere XD development team, many of whom live and work in the area. WebSphere Extended Deployment (wiki) is an IBM product that is an environment for running application servers (WAS and other vendors' products) that gives them grid and autonomic capabilities. The presentation is being hosted by the RTP WebSphere Users' Group.
If you're in the RTP area, check it out.