Hi Matt.
I'm not sure what nesting is. But it is not nesting that I am talking about.
I have a windows mobile device with a storage card.
When I sync music and playlists with the storage card, the music and playlists are synchronised into [folders] (depending on my sync settings in media center).
All songs are synced into /Music/[artist]/[album], and all playlists are synced into /Playlists.
Current Issue:
If I have 3 playlist groups [Rock Music Playlists] [Dance Music Playlists] [Lounge Music Playlists].
If there are 20 smart playlists within each group = that is a total of 60 playlists.
When I sync these playlists with my storage card on my phone, all 60 of these playlists are synchronised into one folder (/Playlists).
Solution:
Create functionality for playlists to be synchronised into folders /Playlists/[playlist group].
For example (from above):
/Playlists/Rock Music Playlists (20)
/Playlists/Dance Music Playlists (20)
/Playlists/Lounge Music Playlists (20)
If the user has many playlists, this would make playlist navigation on music player much easier, be it; Pocket Player, Pocket Music, or Media Player.