BAC

My Mother in law is 81, non/never smoker, and was in excellent health before this summer when she developed a cough that developed into pneumonia.  After several rounds of steroids and antibiotics, a hospital stay and a few weeks of home health care, we saw a pulmonologist and he did a scope.  We were told it was cancer and the oncologist said it was bronchioloalveolar carcinoma. That was Wednesday.   She is not a candiate for surgery or radiation.  Her doctor started her on Tarceva.  They seem to think this can keep the disease under control for her lifetime.  Does anyone have any thoughts or ideas on this plan of treatment?  Have you or others had success with this drug on this type of cancer?  Any thoughts or ideas are appreciated.