Your "Twitter List Widget" does not work anymore? If you use your own local version, you may repair it by fixing the statuses-url that retrieves the json data.
Find the part in your widget that says var k=j+"twitter.com/";var h=25000; and change it to var k=j+"api.twitter.com/1/";var h=25000;
Read more about the Twitter API for lists at dev.twitter.com
(Note to myself: Write an own, lean and comprehensive twitter list widget.)