This research is being done because treatment options are very limited and usually unsuccessful for Acute Myeloid Leukemia (AML) in older individuals, or younger people with disease that has relapsed and/or proven resistant to standard therapy. Subjects are invited to participate in this study that will examine the use of three drugs called Sorafenib (Nexavar), Vorinostat (Zolinza) and Bortezomib (Velcade) for treating acute myeloid leukemia.