I am currently involved in a project looking to collect organizations, ThinkTanks, Universities and companies involved in any HGIS. If you are not familiar with the technical description, perhaps you have used one or are using one. Here are two large projects as well as some others to give you an idea:
http://www.stanford.edu/group/spatialhistory/cgi-bin/site/index.php
https://www.youtube.com/watch?v=2-Ev4rU27HY
Any help is appreciated and if you aren't aware of Historical GIS, then enjoy!
What is the name (and website) of your project, please?
There was a project that mapped Herodotus' histories:
The Hestia project takes up Herodotus’s enquiry through the new medium of our time, digital technology, and involves a collaborative team of researchers from Classical Studies, Geography and Digital Humanities. Using a digital text of Herodotus’s Histories, from which we have extracted all place-names, we use web-mapping technologies such as GIS, Google Earth and Narrative TimeMap to investigate the cultural geography of the ancient world through the eyes of one of its first witnesses.
Some of their results were published in New Worlds out of Old Texts: Approaches to the Spatial Analysis of Ancient Greek Literature.
I'm not sure if this fits into your area of interest, but I do a lot of GIS work for Census using ArcGIS. There are a number of historical shapefiles of United States boundaries dating back to 1790 at http://www.nhgis.org.
It's definitely one of my go-to sites that a couple of the geography gurus around here have recommended to me. I often have to pull older shape files for my work.
The University of Ulster is currently running a project, called "Visualising the Conflict," that uses GIS maps as part of an effort to create a "virtual educational space" in which to learn about the Troubles in Northern Ireland, and even includes a Second Life component.