Roy Trumbull is working his way through the best of Project Gutenberg's texts, reading them aloud in a podcast called "Story Spieler."

Here are some titles that have been downloaded at least 1000 times:

Alex the Parrot-guin
The Jungle Book of Rudyard Kipling
Peter Pan by James M. Barrie
The Marvelous Land of Oz by L. Frank Baum
Indian Old-Man Stories
Flying Saucers 1960
Welsh Fairy Tales
The Story of Dr. Dolittle by Hugh Lofting
The Homely Heroine by Edna Ferber
A Whale on Wall Street
Tom Swift and the Visitor from Planet X
The Time Machine by H.G. Wells
Blue Jays by Mark Twain
The Just-So Stories of Rudyard Kipling
Rip Van Winkle
Chicago by Carl Sandburg
The Sea Fairies by L.Frank Baum
Ozma of Oz by L.Frank Baum
Gems from Shakespeare
The Life of Washington by Washington Irving
The Canterville Ghost by Oscar Wilde
The Reluctant Dragon by Kenneth Grahame
The Ransom of Red Chief by O.Henry
The Cop and the Anthem by O.Henry
The Super Man and the Bugout
The Last Command
Jeff Brigg's Love Story by Bret Harte
The Last Leaf by O.Henry
The Runaway Asteroid
The Dragon of the North
A Retreived Reformation by O. Henry
The Invisible Prince
White Fang by Jack London
The Heart of Danger
The Dragon and his Grandmother
Craphound by Cory Doctorow