This plugin is fantastic: http://wordpress.org/plugins/wp-veriteco-timeline/ and works great. It creates a custom post type to add items to this Timeline http://timeline.verite.co/ rather than using the Google Docs like the original timeline at that site. And it totally works.
The http://timeline.verite.co/ version has been updated to be responsive. The plugin hasn't yet, and it doesn't seem like the plugin author is around anymore. He's not answering support post and his own website is down.
All of the code for the http://timeline.verite.co/ project is on GitHub. I've tried to update it myself in my own install, but let's just say it didn't go as well as I'd like. Is there a way to ask publicly if anyone wants to adopt this and merge the current plugin's functionality with the CSS and media queries from the current repo on Git?
It could also use an option to choose how many posts are displayed in the timeline, rather than using the # set in the general settings for posts.