Let the hive mind of Engadget get that for you.
"I'm looking for a wireless trackpad to use with my older (2.5 or so years old) C2D MacBook that's perpetually docked to my home theater. Something sleek, thin, not too small, made of high quality materials. Ideally, it would natively support all of (Snow) Leopard's multitouch inputs, and even more ideally, it would have a charging dock / base. The only problem is that I'm not sure that such a thing even exists. Think you can throw me a bone?"
The device pictured is the Bipolar Junction Transistor (BJT) which is the first mass produced solid-state transistor. The Field Effect Transistor (FET), which is what's in all our shiny devices, was patented about 25 years before the BJT, but it was not widely used until after the success of the BJT because the BJT was easier to produce.