Includes links to a lot of related sources at the subject page
http://ancienthistory.about.com/od/amen/a/122710-CW-Archaeological-Evidence-About-The-Story-Of-Abraham-In-The-Bible.htm
Google archaeology abraham (http://search.yahoo.com/search;_ylt=Aui0nipK7QqEJySoYffOE6qbvZx4?p=archaeology+abraham&toggle=1&cop=mss&ei=UTF-8&fr=yfp-t-701)