Following Mike Croucher's tutorial, here is my first attempt at including an interactive CDF demonstration in my blog.
In the first example, change the value of n using the slider. Have a close look at the coefficients when n=105. You can show/hide the controls by clicking on the top right + sign. If you click on + sign at the end of the slider you can control the running of the CDF:
Here is a more interesting example demonstrating rotations parameterized by the Eulerian angles:
This would be a useful enhancement to static pages such as wikipedia's rotation matrix entry.