Here is a list of recommended sites:

DC COMICS
MARVEL COMICS
DARK HORSE COMICS

NEWSARAMA All the news that’ll fit on your computer screen!

COMIC BOOK GALAXY Dedicated to bringing you views on the artform and industry of comics with passion, truth and diversity.
Comic Book Net Home Page
Image comics
Spumco : twisted stuff from John Kricafulsi
Kieron Dwyer's Lowest Comic Denominator

Comics Continuum
Cinescape
Wizard Magazine