I've also come up with what I believe is an accurate ashcan census. After all, that was the original topic of this thread. Individual books have been discussed, but I haven't seen an all-inclusive list posted before. As with the scans above, if you have any corrections or better info, please let me know.
Ashcan Title and number of known copies
ACTION COMICS 3
ACTION FUNNIES 3
ALL-AMERICAN COMICS 1
ALL-AMERICAN MEN OF WAR 1
ALL STAR COMICS 1
ANIMAL ANTICS 1 complete book + 10 loose covers
BOY COMMANDOS 6 (two versions exist: with & without "#1" on the cover)
CHAMPION COMICS 2
COMMANDOS 2
CRACK COMICS 1
CYCLONE COMICS 1
FEDERAL MEN COMICS 1
5 CENT COMICS 2
FLASH COMICS (DC) 2
FLASH COMICS (FAWCETT) 3 (two versions exist: with & without cover art)
FUNNY FOLKS 1
GIRL'S LOVE STORIES 1
HEADLINE COMICS 2
HERE'S HOWIE 2
HOUSE OF MYSTERY 2
INTIMATE CONFESSIONS 3
LEADING COMICS 1
MOVIE CARTOONS 10 loose covers
MOVIE FABLES 10 loose covers
MOVIE GEMS 10 loose covers
MYSTERIOUS STRANGER 1
MYSTERY TRAIL 1
NICKEL COMICS 2
O.K. COMICS 1
OLD GLORY COMICS 1
ONCE UPON A TIME 1
OUR MEN AT WAR 2
PHANTOM STRANGER 1
RADIO FUNNIES 1
REAL FACT COMICS 10 loose covers
REAL SCREEN FUNNIES 3
RED, WHITE & BLUE COMICS 1
ROCK 'N' ROLL COMICS 1
SCREEN CARTOONS 10 loose covers
SCREEN COMICS 10 loose covers
SCREEN FABLES 10 loose covers
SCREEN FUNNIES 10 loose covers
SCREEN GEMS 10 loose covers
SLAM-BANG COMICS 1
SPOTLIGHT 1
STAR-SPANGLED WAR STORIES 1
STRANGE ADVENTURES 3
SUPERBOY 1
SUPERGIRL 1
SUPERMAN 2
SUPERMAN....SUPERHOMBRE 1
SUPERWOMAN 2
THRILL COMICS 3
WESTERN SERENADE 1
WONDERFUL WORLD FOR BOYS & GIRLS 1
WONDER WOMAN 1
WORLD'S BEST COMICS 2