Amnesty International has an online letter to President Bush requesting he support a UN Security Council Mission to investigate in Myanmar (Burma).
http://www.amnestyusa.org/Myanmar_Burma/Action/page.do?id=YCA0955109000E&n1=3&n2=30&n3=955
http://www.amnestyusa.org/Myanmar_Burma/Action/page.do?id=YCA0955109000E&n1=3&n2=30&n3=955