Some interesting new online features have arisen for TF fans. They're more for the kids, but also work for the kid at heart.
You can do a couple of different things on these websites taking advantage of a camera attachment to your computer.
Change yourself into ROTF Optimus Prime here at...
'We Are Autobots.com'(plug in may be needed)
Here's a youtube clip of the function in action.
And then the official Transformers Revenge of the Fallen website adds a little photo fun with
'Robotize Me'. This adds a TF body to a picture of you, so your face appears where the robot's face would be.
Thanks to Real Devastator for the fun links!