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Links under each category are a bit too common. Maybe you can add some style to make 'em a bit original. I would also skip the "http://" part - it's obvious and makes the link hard to distinguish.
Header is a bit too "sparkling" if you know what I mean... I would also consider replacing drupal site-icon.
Typo colour inside catalogue could be dark grey instead off solid-black.
Good use of Drupal though. :)
