The soundtrack will be released on CD in France on August 9th. Amazon.fr link:
http://www.amazon.fr/Biens-Aim%C3%A9s-Bof-Alex-Beaupain/dp/B0055U9KYM/ref=sr_1_9?s=music&ie=UTF8&qid=1311476667&sr=1-9
The soundtrack should be available world-wide via iTunes on August 8th. Search iTunes for either Alex Beaupain (composer) or the French title, Les bien-aimes.
Trailer:
A live performance of a song from the film, "Prague," by Ludivine Sagnier:
Interview with Christophe Honore (in French):
Interview with actresses Catherine Deneuve, Chiara Mastroianni and Ludivine Sagnier (in French):
Interview with actor Louis Garrel (in French):
Interview with composer & songwriter Alex Beaupain (in French):
