Found references to Open Source archaeology site at Digg.com tonight.
One of the links led to an interesting site:
"IOSA stands for Internet and Open Source in Archaeology. It is a research group of young archaeologists within grupporicerche. The aim of the web site and of IOSA research team is to promote the use of open source software and open stardards in archaeological computing. Any help is welcome and users are encouraged to register and contribute through discussion forums. IOSA.it is open to all who are interested in archaeology and free software (free as in freedom)."
I don't do archaeology, but being a specialist in ancient texts I'm interested in historical geography and maps, a shared interest with archaeologists. The links section of the site has a GIS and cartography, open access, and epigraphy sections.