Vermont was hard hit by Irene. There are lots of photos and videos out there showing some of the devastation and flooding; here are maps that give some sense for the area involved.
River information from the Northeast River Forecast Center (RFC).
Vermont road information from VTrans. Please check current road conditions; this is not a current road map. An interactive Google map of Vermont highway conditions has more precision.
Vermont New Road Closures is a crowd-sourced map, which includes information about local roads not otherwise noted on the official map. This is a snapshot from August 31, 2011.
Google.org's Vermont Flooding 2011 map has a series of map overlays; this one depicts bridges out, roads closed, and towns that are isolated. Much of the data can be downloaded in KML formats, and the interactive version of this lets you zoom in; this snapshot is observed August 31, 2011.