So, it's now six months later (May 2011). I came across this thread because I have a ShuttleXpress that worked flawlessly with SONAR 5PE, but now fails miserably with SONAR X1PE.
Before, I was using the CS plugin that was written way-back for SONAR 3, adn which still worked for SONAR 5. It wasn't really all that bad, just not configurable. The latest basic driver/applet fmo the Contour Support webpage actually did work in X1, after I re-targeted the executable in the "Application setting" > Options. BUT, then I needed Lexicon Pantheon to work, for which the current workaround is to run the SONAR executable (SONARPDR.exe) in Compatibility Mode as Administrator. Since setting that, the Shuttle no longer talks to SONAR, even though the Taskbar icon indicates that SONARPDR.exe has the focus. (Whether teh Shuttle isn't talking, or SONAR isn't listening, or Windows isn't passing the message, I don't know.)
It would be great to see support for SONAR again. I have always liked my little UFO-shaped jog/shuttle wheel in SONAR, and would like to continue doing so, whether with the basic applet, or even better, a CS plugin.
So, did the trail of supprt die, or did it perhaps move to another thread?