Definitely one for the ages:

US - Gold
France - Silver Australia - Bronze

Michael Phelps 47.51 (American Record) Amaury Leveaux 47.91
Eamon Sullivan 47.24 (World Record)

Garrett Weber-Gale 47.02 Fabien Gilot 47.05
Andrew Lauterstein 47.87

Cullen Jones 47.65 Frederick
Bousquet 46.63 Ashley Callus 47.55

Jason Lezak 46.06 (fastest split ever) Alain Bernard 46.73
Matt Targett 47.25

3:08.24 (World Record)
3:08.32 3:09.91