there is no Mrs. Biden. She and their 1 year old daughter were killed in a traffic accident some time ago.
He has remarried.
****************************************
Check out the current Mrs. Biden, 8/27/2008:
http://images.google.com/imgres?imgurl=http://farm1.static.flickr.com/145/375043431_3a4fec82d7.jpg&imgrefurl=http://www.flickr.com/photos/joebiden/375043431/&h=500&w=495&sz=127&hl=en&start=3&um=1&usg=__byc851Wm0TNDn7INVcPEexmISZ8=&tbnid=PYYGYrnPdrL1mM:&tbnh=130&tbnw=129&prev=/images%3Fq%3Djill%2Bbiden%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DN