The invention provides novel compounds which bind to the human erbB2 gene product (ErbB2, also known as HER2, or c-ErbB-2). In particular aspects, the invention provides for the treatment of disorders characterized by the overexpression of ErbB2 utilizing the novel compounds of the invention. The invention also provides pharmaceutical compositions comprising the novel compounds as well as for their use in research, diagnostic, therapeutic, and prophylactic methods.