With the new firmware upgrades from D-Link and from Tvix, I think this may have have been resolved. This is one of the features of the new firmware upgrade for Tvix 6500. It already supports NFS and Samba.
2) UPnP feature
- UPnP media server can be detected on pressing "UPnP" button
- UPnP may support high bitrates contents which cannot be supported by NFS