The support bearing seems to be a common failure issue. It hasn't happened to me yet, but many at VWVortex complain. The bearing itself doesn't seem to fail, but the rubber mounting around it goes bad. The only fix from VW is to replace the entire driveshaft. (The driveshaft has been through a few revisions since introduced, so maybe it has been improved.)
The VW replacement includes all parts, even the rubber flex joint, and it isn't hard to change. Some online VW dealers have it a a pretty good discount, such as:
http://www.trademotion.com/partlocator/index.cfm?siteid=214687&catalogid=0