The best starting point for discussing the question of OPEN ACCESS to Heritage Collections is ECHO
http://echo.mpiwg-berlin.mpg.de/ECHO/home
Motivation
The ECHO initiative has been motivated by the observation that, at present, information relevant to cultural heritage still plays only a marginal role in the Internet: the number one medium for current and future scientific work, communication and general archiving.
Basic idea
The basic idea of the ECHO-initiative therefore is to establish an open-source culture of the public and scholarly exploitation of cultural heritage on the Internet. This idea comprises the promotion of content-driven technology in information management.
Aim
The aim is to create an Agora, a community of producers and users of culturally relevant information, who are willing to freely exchange this in order to build a joint portal and a common infrastructure.
Several digitized collections are online on the mentioned website!