Portals
http://nebraskarules.tripod.com/index.html
Lots of interesting bits about Nebraska. Ghost town list, and more.
http://symboldictionary.net/
This one looked good for many different kinds of research.
http://www.invisiblearticles.com/
Just briefly perused this one, but it looked like it would have a lot of interesting info in it...
http://www.ghosttowns.com/states/ne/ne.html
Link to a listing of Nebraska ghost towns... proved pretty useful; I limited myself to looking at only the bottom half of the state, though, to start.
http://hollowhill.com/
This seemed like a really interesting website.
www.mysterious-america.net
Reviews of the latest books and plenty of fascinating archived materials that cover the world of the unexplained from A to Z; recommended by Dennis