Hey Chip Board, I have a project which I hope will be of interest to the community here. I got interested in trying to figure out how modern Las Vegas came to be - "what was where." I found that photos from each decade looked completely different from the next, and that the existing property histories were inaccurate or lacking, so I set out to make my own. Little did I know I’d still be working on the project a few years later. This is a photo-based website, and each photo in this collection – many of which are my own slide scans – can be searched by year and property name.
http://vintagelasvegas.tumblr.com

Focusing on "the strip," I've gone through city directories, property maps, and such to find every hotel, motel, casino and race book that existed along the road (1930s-2000). There are links here to photos to all but a few obscure places.
http://vintagelasvegas.tumblr.com/strip

Fuller’s Index of Nevada Gambling Establishments and the digital collection at UNLV were both a major help to this project. I found minor errors in both of those sources, such as street listings for "S Las Vegas Blvd" before the Blvd was named.

There are a few casinos which will be known to chip collectors which I haven't found in photos, such as Matty’s Tropics, Casa Vegas, Leo Kind’s Panguingui Parlor, El Rancho Dio.