Most media centre applications now are adding support for trak.tv (XBMP, Plex etc) this basically reports back whats being watched and it would be great if this was integrated into subsonic somehow.
They have a fully documented API (http://trakt.tv/api-docs) so it shouldn't really be a massive chore the have the video player report back the currently playing title.
Try posting over on the mods forum - some bored modder may take you up on this. As you say it looks fairly easy to implement for those that understand such things
Everyone is entitled to be stupid, but some abuse the privilege!
Due to the confusion from too many genres of music, we have decided to put both country music and rap music into the genre of Crap music.