We could even offer a service: I'm sure some of us have (semi-)professional film scanners (I do). Deal goes like this: mail us your films (encyclopedia/commons-style only; not your family picknick;-) and a note that releases them under GFDL/CC/PD/whatever, and we'll upload them in high-res on commons, where you can download them. Free film digitization!
On the subject of digitizing, you might be interested by the project Wikimedia Deutschland just completed, that of digitizing a 16th century book for Wikisource.
http://www.wikimedia.de/index.php?p=127
It might be an interesting thing to have the chapters and/or the Foundation vouch for the people proposing this kind of service. I believe not everyone is ready to give their pics/files whatever to people they've never seen and who just say "I have a scanner, I can do this for you". There are practical issues to take into consideration which go from conservations of the documents to returning them to their owner.
Compiling a list of people interested by such a project though would be indeed a great idea, and commons probably is the place to start.
Delphine