Just to update everyone, I put some iso's on my WD MyBook AV and connected them via sata cable to the 93. Playback was flawless and it recognizes the files fine, pretty cool. I may catalog some movies on a few drives.
Per the request from the studios, the ISO file playback function has been removed in this firmware version. The previous firmware had the ability to play ISO files, but it was an undocumented function and was never officially announced or supported. Future firmware version will no longer support ISO playback.
The standard Blu-ray will work on the Official Firmware, but you will need to have BD-LIVE enabled and you will need to have the player connected to the network.
Even when doing this, there is still the chance that the disc does not load. The only real sure fire way to load this disc is to use the current Beta Firmware with or without BD-LIVE Access and a physical internet connection being active.