From Entertainment Weekly:
It’s been 22 years since Superman first flew onto the big screen, but he’s as popular as ever online, where fans have collected enough stories and photos about the ”Super” flicks to fill a Sunday edition of the Daily Planet. At Superman Cinema, scene-by-scene analyses of all four film installments plus ”Supergirl” point out inconsistencies and flubs, while articles and interviews provide eyebrow-raising insight into the turmoil that often plagued the productions.
There is also a site where you can get more information Superman. They used to have a freely available re-edit of Superman II, but Warner Bros made them take it down. Check out the site at http://www.supermancinema.co.uk/