There's also a group operating out of Cleveland State University called the Center for Public History & Digital Humanities: http://csudigitalhumanities.org/ I'm not familiar with them beyond a little exploration of their site, but they may be good folks to talk to.
A couple of us public history/museum/digital humanities types keep noting the parallels between the mores and techniques of the two fields, but not a whole lot has been done systematically that I'm aware of, either. Sharon's series that SheRah1918 noted above does a nice job of addressing those parallels.
There's evidently a special issue of Library Trends coming out soon on "Involving Users in the Co-Construction of Digital Knowledge in Libraries, Archives and Museums," but I'm not sure when we can expect it.
Paul Marty, who is one of the editors of that issue, is also one of the editors of Museum Informatics: People, Information, and Technology in Museums, which while not drawing the parallels between DH and PH explicitly does address some areas of commonality.