- Crossfading
- Double click folders in files tab
- Nice error messages
- Automatically install xine plugins
- Copy to library, move to library
- Edit tags in the playlist
- Global shortcut keys
- Make QSortFilterProxyModel on the library obey hasChildren()
- More columns in playlist

Last.fm:
- Artist/tag/etc. radio
- More types of radio

Long-term:
- iPod

Windows:
- Playlist delegates
- Document build steps