Even a snapshot of smart and dumb playlists would be better than nothing. The use case is, users who want to migrate to Spotify from whatever they've been using for years, intend to copy over their playlists to Spotify, and permanently switch to Spotify as their main playlist organizer/generator. But having to recreate all their playlists by hand in Spotify is enough to stymie even the most enthusiastic US/NA Spotify fan.
Same problem on the Android app I just discovered yesterday, all my local playlists are made with a third party app called Playlist Builder, and both PowerAMP and Google Music can use them, but apparently not Spotify. I only have Premium, but it seems Premium is intended to enable local music and playlists just not sharing and streaming...
You can drag a playlist from iTunes and drop it on the "New Playlist" button in the left sidebar in Spotify. I don't know if it works with Genius lists, but it works with "Recently Played" and other dynamic lists.
.m3u8, all stored in what appears to be /Playlists, though my phone isn't rooted so I'm not sure if that's the highest level of the directory structure.
Same problem on the Android app I just discovered yesterday, all my local playlists are made with a third party app called Playlist Builder, and both PowerAMP and Google Music can use them, but apparently not Spotify. I only have Premium, but it seems Premium is intended to enable local music and playlists just not sharing and streaming...