This is my current temporary fix to get SugarJS's static method additions working in typescript.
/// <reference path="../path/to/sugar.d.ts" />
/**
* Usage Examples:
* sgObject.isArray([1]); // -> true
*/
declare var sgObject:ObjectStatic;
declare var sgNumber:NumberStatic;
declare var sgDate:DateStatic;
declare var sgRegExp:RegExpStatic;
eval(
"sgObject = Object;" +
"sgNumber = Number;" +
"sgDate = Date;" +
"sgRegExp = RegExp;"
);