Instructables has a great hack to turn an old Power Glove, that triumph of silliness, into an Arduino-controlled, Bluetooth-and-accelerometer-sporting modern peripheral.
The new and much-improved Power Glove is positioned as kind of a 20th anniversary present to the original Glove. The video below gives a pretty detailed instruction for how to tear apart your own Power Glove, presuming you can find one, and also shows him using it with an iPhone boxing game he's developing.
Finally, the future looks like we imagined it would in 1989. [Instructables, creator's blog]