The only thing the photo channel uses for music is background for slide shows right? That's great and all, but if I really wanted a particular song to back up my slide show then I could convert it to a format that worked.
Now, who in there right mind is using that to actually play their entire music collection??
Nintendo knows this feature is seldom used. That's why they're dropping it. It is probably due to licensing issues or money. However, if we want to complain about music support on the Wii, we should first be complaining about the lack of a channel whose goal is to play music, not some dinky side feature of the photo channel.