Video Copilot has a new tutorial on making Dynamic Bar Graphs:
"In this new tutorial we will isolate bar elements from a 3D render to build a customizable bar graph in After Effects. We will use expressions to control time-remapping and link values for the displays. The tutorial is a cool 20 minutes for quick viewing and easy reference for when you get the call…"
For similar efforts, see the AEP round-up Charts and graphs in After Effects and Leveraging tools for journalists. Specky Boy has an updated survey for the websters, 25 Graph and Chart Solutions for Web Developers.