No problem, I'm glad you've found it useful. ;)
Actually, the Seine-Maritimes archives have already been digitalized and were announced on-line for last autumn but they also had to relocate meanwhile so the project was delayed. They should reopen to the public next month so the on-line release is tentatively forecast for March 2012. BUT it won't help you much as you won't find there archives less than 100 years old, as ruled by the French administrative authority protecting personal data (CNIL).
Though the privacy delay was reduced by law from 100 to 75 years in 2008, it was decided to keep a delay of 100 or even 120 years for on-line publishing. Same for indexes (tables décennales) which theoretically can be accessed without delay now but generally are not freely accessible (the town clerk has to do the search for you).
However the law protect essentially the lineage for vital records so it might not bother you too much, depending on what you're looking for. Just remember these points:
1) there's no time delay for death certificates. Anyone can ask for a full copy any time for any reason.
2) for less 75 years old birth or marriage certificates: if you're not a direct descendant, you can still ask an 'extrait sans filiation' (extract without filiation). It won't give you the parents' names but it should indicate the eventual notes in the margin, such as marriage/death/adoption date & place for the birth certificate, and divorce for the marriage certificate.
3) if you already have the parents name and the exact date of birth/marriage, use the on-line forms if they exist. They generally don't ask for other proof of direct lineage so just say you're a grandchild and you'll get your full copy... :p
Good luck! ;)