Something super interesting/geeky looking on a Nikon Rumors post.
Custom profiles for Picture Control settings.
I think you can upload them to your camera using the Picture Control Utility.
It includes profiles for some classic film stock as well as modern cameras.
A friend used custom profiles to boost his blue skies on Ibiza outdoor clubbing photos on his 5D.
Alas I can’t try them yet as I just dropped my camera off for a service today.