Background: I'm a physician and medical informaticist with the Veterans Health Administration, part of the U.S. Department of Veterans Affairs. My primary responsibility is for interagency liaison with the Indian Health Service (part of the U. S. Department of Health and Human Services). I'm interested in TWiki, and Wikis in general, because we need a fluid platform for interagency collaboration, and many alternatives (e.g., Microsoft SharePoint) require more administration and development resources that we have available, as well as being somewhat rigid.