Thanks to David Alexander for lots of entries from his abandoned book project (which I've included the full text as a link on the website). I've only completed adding entries up to 1900 to the timeline.
I also added the filtering and highlighting capability. By typing text in the appropriate boxes, it will either remove all events that do not have that text in the title or description (filtering) or highlight those events in color that do have that text.
Joe, Just a minor correction: You have it listed that Nate Leipzig began his professional career in 1903. It was actually towards the end of 1902 that he left home to get started in show business (though not immediately as a magician). The earliest mention of him is in the November 1902 Sphinx.
I moved all the code under my yahoo account. It's slower, but now it doesn't depend on any outside code so hopefully it will not have any more of these problems. If anyone wants to host this timeline on a better server, I'd gladly provide all the code and data.