I agree with the multi-format proposal. I love lossless music and, thanks to the price of HD space going down, I often happen to encode my CDs to (FLAC or APE)+CUE.

Furthermore, due to broadband connections it's now possible to download live shows taped by people in SHN or APE format, and then burn them to CD. It would be nice to have the possibility to add them to the database without having to burn them.

I don't really use mp3s though, and I think I wouldn't use mp3 support: just lossless music in my OrangeCD database.