I was on a quest to find the organization charts of online businesses when I came across Cog Map. This website utilizes the Wiki concept and allows users to create or modify organizations charts. There are many company’s already listed on here, and it is a growing database. Of course, as with Wikipedia one has to be careful and find more authentic sources for the information presented on any kind of Wiki.
The web-based utility allows you to download the organization strusture as a Comma Separated Values (csv) file and also has a feature that allows you to track changes in a given organization chart. Here is Google’s Organization Chart as an example.