BNG  I tried out this product (the video tour was very helpful :)) and I have to say it's pretty good. Intuitive, easy to use, and a nice UI to boot, but there are some obvious enhancement possibilities in my opinion. I noticed some other reviewers had some of the same things in mind: multiple timelines, hyperlinks, notes, etc. The only other timeline software for Mac I could find is called Timeflyer(www.asinglepixel.com). I also tried it out and I was able to create multiple timelines and add hyperlinks and notes. You can also export your timelines to pdf, png, and even Quicktime. There is also a beta of 3d views. I am interested to see if Bee Docs has any of these features in store for a future release.   
(Version 1.52)