Hawaii , by somebody named Tony. See also Ron Orenstein's  Video Birding in Hawaii

Massachusetts , by the Brookline Bird Club

Connecticut , by David Provencher

Delaware , by Maurice Barnhill

Maryland and Washington, D.C. , by Fran Saunders. See also the  Baltimore Bird Club  home page.

Virginia , by Ken Klotz

North Carolina , by Will Cook

     Mecklenburg Audubon Society  (for the Charlotte vicinity), by Judy Walker

South Carolina , by Donna Bailey

Georgia , by Jim Flynn. You can also check out the web site of the  Atlanta Audubon Society  for more Georgia birding sites.

South Florida , by Steve  Mumford (I think)

North Florida  and more, by Noel Wamer

Louisiana , by David L'Hoste

The Great Texas Wildlife Trails, by the Texas Parks and Wildlife Department    

New Mexico , by Jerry Oldenettel

Minnesota , by Anthony Hertzel

Michigan , by Keith Saylor

Illinois , by Urs Geiser

Indiana , by the Indiana Audubon Society

Ohio , by Victor Fazio

Kansas , by Dave Rintoul

Missouri , more specifically St. Louis, by Jim Malone

Iowa , by Ann Johnson and the Iowa Ornithologist's Union

South Dakota , by the South Dakota Ornithologist's Union

California , by Joe Morlan

Nevada , by Ted Floyd. Actually a description of a state "Big Year", not a formal birder's guide, but as close as I can find...

And more to come... If you know of a good website for a state that is not included here, please let me know via   e-mail  at jsr6@acpub.duke.edu.