I have a SMP that plays media from my Synology NAS. The Media Library is completely unusable. Using any kind of sorting means scrolling or changing folder takes between 20 - 50 seconds in my experience. I thought the problem might be that there is a 100Mb link between the SMP and the NAS so I setup a 1Gb link between the two and it did not change anything. I do not think there is a resolution for this in the current firmware. The fact that the SMP has to go to the NAS, gather all the folders and files, sort them and filter them every time I change folder is crazy slow. A way around this would be to allow the data to be stored locally. A single db file with all the info about all the files and folders on the nas, as well as all the metadata and art. So I would like to suggest three changes for a future firmware
1. Add option to System -> Media Library. If there is a usb drive connected store all media library info on that. If that drive is disconnected then turn off media library and request new source i.e Network share or Media Server
2. Allow other devices to notify the WDTV Media Library of updates i.e A program like Sick Beard can notify my Synolgy NAS Media Server when it has updated a folder
3. Allow sorting on recently aired for TV shows and release date for movies, like Plex or XBMC do, in the dashboard instead of just added date.