I sent a letter asking some questions, and SAE with US Stamps on, sent on: 16th June 2009, today I recieved just a signed playbill back signed by her, and no Q+A sheet back. Plus she added an extra stamp on my envelope.
address I used was:
Angela Lansbury,
c/o Shubert Theatre,
225. West 44th Street,
New York
NY 10036
USA