I'm an avid consumer of audiobooks from Audible.com.
I listen to them every day in my drive to and from work and during a daily half-hour walk. I've got twin 3-year-old girls, so reading is gone for now; but Audible's assortment is large enough to keep me very happy.
I listen to military history, economics (I highly recommend Basic Economics, by Sowell, or if you are limited for time, Economics in One Lesson, by Hazlitt -- economics plays an enormous part in the world, and every American owes it to himself and the nation to read one of those two books), world history, biographies, and political/social topics, and fantasy and science fiction.
Audible has an awesome coverage of military history. In the WWII category, I've listened to the following, many of which are awesome books (let me know if you want any recommendations

).
A Dawn Like Thunder
The Day of Battle: The War in Sicily and Italy
Intrepid Aviators
South Pacific Destroyer
The Twilight Warriors
Finish Forty and Home
With the Old Breed
Neptune's Inferno
Whirlwind: The Air War Against Japan
Unbroken
Fighter Pilot
To Hell and Back
Red November
A Measureless Peril
Intrepid: The Epic Story of America's Most Legendary Warship
No Simple Victory
Iwo Jima
FLAK
Blind Man's Bluff
Fly
Into the Rising Sun
The Bravest Man
One Man's War
Ship of Ghosts
Roughneck Nine-One
Beyond Band of Brothers
Brotherhood of Heroes
The Jedburghs
The Greatest Aces
Flying Through Midnight
Midway
Brothers in Arms
Silent Running
Ghost Soldiers
WWII Airmen
Patton
Combat Swimmer
The Last Stand of the Tin Can Sailors
Angles of Attack
Beyond Valor
Citizen Soldiers
The Wild Blue
An Army at Dawn
Band of Brothers
We Were Soldiers Once . . . and Young