The 3rd party software that allows video playback on your TT devices have released a great update that now supports MP3 playback. It also sports a new user interface giving it a fresh look.
I just installed the update and it works great.
I don't know how limited the demo might be as I own the full version but give it a try and see what you think.
http://www.mobilnova.com/MobilNova/en/Downloads.php
Oh, also it works on the 520/720 so it apparently works with the NavCore 7 firmware. Nextourer, I know you were looking for this tidbit
I just installed the update and it works great.
I don't know how limited the demo might be as I own the full version but give it a try and see what you think.
http://www.mobilnova.com/MobilNova/en/Downloads.php
Oh, also it works on the 520/720 so it apparently works with the NavCore 7 firmware. Nextourer, I know you were looking for this tidbit