You should include ArcadiaCharts: http:www.arcadiacharts.com as well. It's free for non-commercial and is pretty easy to use. I like its look a lot.
What about including FusionCharts.com ? Provider of interactive JavaScript (HTML5) chart application components.
It might be useful to explain what some of the categories mean
This is something I have spent quite a bit of time researching myself
For those looking for a simple, open-source Javascript Organizational Chart library: I've just published lib_gg_orgchart. It uses a JSON input and draws the chart using Raphael. This library satisfies requirements #1 and #2 of the original question. Take a look at the site for some examples and download: fluxus.com.ve/... If you find it useful, please let me know.