I'm currently in the process of reviewing requests for SyncTunes and have already released a beta that includes PLS playlists, multiple playlists for iTunes folder playlists, support for automaunt NFS volumes.

[Update] Up to beta 5 and it now includes better synchronisation implemented for 'Replace' mode sync. For non-Simple Mode sync, the current tracks will be scanned and the un-needed files are removed before copying over any new tracks from iTunes. The result is a much faster sync for playlist that don't have wholesale changes between syncs.

You can find out more about the beta here.