ZD 1.x is based on the older versions of the 5.0.x branch of ZWC. ZD 2.0 will be based on the 6.0.x branch, the first beta build of that is currently scheduled to be released on 2/12/10. You can follow it's status here:
Zimbra Product Portal
You can also file a bug for the current ZD and see whether they will fix it before the 2.0 release.