Bisenti Municipal Website - Information on local businesses, restaurants, places to visit etc - some pages in English
Bisenti - Personal website of Marcello De Antoniis promoting Bisenti - plenty of photos and a soundtrack of Abruzzan folksong, so worth a look even if you don't speak Italian
Lago Di Penne - Information on the WWF reserve. In Italian only.
Bradt Travel Guide - Purchase site for the first and only English-language guide to Abruzzo