I've just discovered that Informal Science has the VSA archive online:

"Full articles from The Visitor Studies Association's archive of Visitor Behavior, Visitor Studies Today, (1998 - 2006) and Visitor Studies: theory, research and practice (1988-1996) are now available for search and download through a collaboration between InformalScience.org and the Visitor Studies Association.

For access to full articles published after 2006, please go to Visitor Studies the new VSA journal published by Routledge."

See http://www2.informalscience.org/vsa to search the archive

Thanks for a great addition to freely accessible research resources online!

/jt

Research about Museums and the Web is scattered in many different forms and publications.