I was trying to figure out how to program my new iPod via C#. My first thought was to Google up some sample code, but to my surprise, I found nothing. So, trial and error and here's a starting point for anybody else interested in this endeavor.

public iTunesLib.iTunesAppClass app;
public iTunesLib.IITIPodSource ipod;

public iTunesLib.IITIPodSource IPodSource()
{
   foreach(iTunesLib.IITSource source in this.app.Sources)
   {
      if (source.Kind == iTunesLib.ITSourceKind.ITSourceKindIPod)
      {
         return (iTunesLib.IITIPodSource)source;
      }
   }
   return null;
}

public iTunesLib.IITPlaylist Playlist(string name)
{
   foreach(iTunesLib.IITPlaylist pl in this.ipod.Playlists)
   {
      if (pl.Name == name)
      {
         return pl;
      }
   }
   object obj = this.ipod;
   return this.app.CreatePlaylistInSource("kbJuice", ref obj);
}

public static void Main(string[] args)
{
   MainClass o = new MainClass();
   o.app = new iTunesLib.iTunesAppClass();
   o.ipod = o.IPodSource();
   iTunesLib.IITUserPlaylist upl = (iTunesLib.IITUserPlaylist)o.Playlist("kbJuice");
   iTunesLib.IITOperationStatus status = upl.AddFile(@"filename");
   while (status.InProgress)
   {
      System.Threading.Thread.Sleep(1000);
   }
   o.ipod.UpdateIPod();
   o.ipod.EjectIPod();
}