WDEV and all its Radio Vermont stations are on the air 24 hours a day, with storm-related coverage. Help them with your emails to news@radiovermont.com or calls to 802-244-1777 or toll-free 877-291-8255.
Frequencies: 550 AM, 96.1 FM, 96.5 FM in Montpelier, 101.7 FM, 93.9 FM Morrisville.
The best web-based resources I've found so far are:
http://twitter.com/#!/search/KeithMontpVT
Includes monitoring of scanner traffic and information about street closures and evacuations in Montpelier.
http://twitter.com/#!/JennaPizzi
Includes info about flooding in Barre, including photos and videos.
http://7d.blogs.com/blurt/2011/08/irene-vermont-photos.html#more
Crowd-sourced map of Vermont with pictures of damage in various locations. They're soliciting more, so it will hopefully become more valuable. Unfortunately, there's no time stamps on most of the photos.