I'm Sam Morrison, and I built TreeAlive, a website that puts family trees and historic places on the maps of their time. Since you serve on the USGenWeb Advisory Board and as State Coordinator for Maryland, Colorado and Wyoming, I should mention that I've written to about 40 county coordinators since mid-October, three of them in Maryland, and county sites in Illinois, Arizona and New York have added TreeAlive to their pages. I'm writing to ask whether you'd pass TreeAlive along to your county coordinators, because I think it may suit their sites.
Maryland has 1,587 places on the National Register of Historic Places, and on TreeAlive nearly every one opens on a historical map. Here's St. Mary's Church in Emmorton, on an 1866 map of Harford County:

Colorado's 1,581 places and Wyoming's 530 are on TreeAlive too.
For anyone with a family tree, from a GEDCOM file, FamilySearch or WikiTree, it also shows the family's moves as a short animated film. Journey walks one ancestor's life stop by stop on maps from around each year, and Time Machine shows what else the family was doing at any moment you pick. Historic Crossings shows which of these places the family lived near, and which historic figures were nearby at the same time.
It's free to use, with no account or subscription needed to try it, and it's listed in the FamilySearch Solutions Gallery. This link opens a finished sample family with everything ready to explore, no tree needed:
treealive.com/?demo=johndoeWould you consider passing it along? A line like this would do on a county site's links or resources page, and on your own Chittenden County site too, if it suits:
TreeAlive (free): your family tree on historical maps from the years your ancestors lived, with the historic places they lived near.
treealive.comEach state has one page listing its places by county,
treealive.com/nr/md,
treealive.com/nr/co and
treealive.com/nr/wy, so a coordinator can find their own county there.
If you'd rather I approached coordinators differently, I'd like to know. I'm glad to answer any questions.
Thanks for considering it,
Sam Morrison