What's involved in making such a demodulator? Does it take the line-in and work with that? Also what location data does the TMC hold - lat/lon? I have been using UK TPEG messages via the internet to display traffic data in MapPoint successfully so far but this would negate the need for an internet connection for traffic data.
Is it possible that you could make available the schematics as I would be interested in making a module that works with the D-Link to test