From a quick search, it seems it might be possible to export your playlists to grooveshark then export them from grooveshark to another format but if you're just thinking in terms of playlists of local files, why not create them in one of the standard players - itunes or WMP then import them into spotify?
Thank you for the tip and thanks to all who commented on this post. All of my target files are local. Having already built my 500 plus tracks in Spotify I just want to avoid the task of doing it all over.
Re: How to export playlist text from Spotify to itunes ?