The Peugeot 908RC is a halo car for the PSA group. It's going to use the same 12 cylinder 5.5 litre diesel as the 908 Le Mans racer (Detuned and cleaned up obviously). It's supposed to be the answer to Audis Q7 V12 TDi (to be launched at the end of this year).
As far as seeing one on the road I seriously doubt it, although there is one other car that resembles this car (I'm not challenging anyones intelligence here). It's the Citroën C6.

Here's a little report on the car in question:
http://www.automobilemag.com/auto_shows/0609_2006_peugeot_908rc_concept/
It seems it'll never see the light of day 