Does anyone know of any good sites for information about ataxia telangiectasia?

Try these: I would refer to the national institute of health page at: http://www.Ninds.Nih.Gov/disorders/a_t/a-t.Htm as well as the national cancer institutes site at http://www.Cancer.Gov/cancertopics/factsheet/risk/ataxia these sites document frequent causes of morbidity in at, notably the ataxia as well as susceptibility to malignancy and immunocompromise that occur in this condition.