On-line Open Access "journals" and e-text repositories are very nice, but archaeology doesn't have any big or commonly used ones yet. This may be about to change with the Italian site Journal of Intercultural and Interdisciplinary Archaeology.
At the moment, much of the site is in Italian. Full-text repository searches for the words "Mesolithic", "Mycenaean" and "Merovingian" didn't turn up any hits. "Bronze" scored four hits, "Iron" six. Worse, the material published in the Journal doesn't seem to have been entered into the repository, and I could find no PDF files, only texts hacked up into a number of html "pages". But perhaps there's a lot of good stuff in Italian there? Do tell, Dear Reader, if you find anything.
I'm attempting to set up a list of links to open access material at http://www.wikiarc.org/links, and to make it all searchable using Google Custom Search. I'm sure the search could be a lot more elegant, and the list is far from definitive, but please do give it a go and let me know if you have any suggestions.
All the best,