Since I have a hearing loss, it's very difficult for me to follow along with the words of a song. I almost always have a copy of the lyrics of the song on my PC. I'd like to have the option of syncing it to my Zune with the song! That was I can read along and scroll up or down with the lyrics at my own speed.
If WiFi is enabled, we should be able to have a program to retrieve lyrics like TuneWiki. But only if you don't already have the lyrics embedded or in a linked file to the music.
I'd also like to provide an SRT or other captions timecoded file that the video player can use to overlay captions on a video on the Zune. That would allow me to read captions of videos I have subtitles for.
The last would be the ability to have a karaoke mode where the lyrics are also timecoded with my music file and prompt me for which line to sing. There would be options like how many lines to show, how to color the lyrics, size of the lyrics, etc.