NDG is currently being developed around eXist, but we’ve had problems with scalability and reliability. It’s not yet obvious why … but as a consequence we’ve had to have some backup plans for what would happen if eXist failed to deliver for us. One of our backup plans was to keep an eye on the Berkely DB XML project. We didn’t use it initially because we wanted to exploit xquery. Well, now, with version 2.07 announced (see previous link), it supports xquery, so no doubt we’ll be testing it in the coming months. It’s very pleasing that there are already suse rpms.