I was asked by a client recently to explore online timeline solutions for a website project. I found many, most of them decent. This one I thought stood out from the crowd though. I really like the ease of setup and ease of embedding links to external media of different types (YouTube, Wikipedia, etc). I also like that it is an open-source project. I haven’t used it yet, but if this project goes forward I will followup here – this is the direction I will recommend.
Check it out here: http://timeline.verite.co/