Can the Droid Eris be charged on a PowerPlate Wireless Induction Charging Base? Can the Droid Eris be charged on a PowerPlate Wireless Induction Charging Base?
eldarerathis is right.  The PowerPlate is a two part system.  1. The Base and 2. The Receiver.  The receiver clips onto the phone and is specific to the phone.  It looks like the powerplate system replaces the battery cover on the blackberry and is a snap-on cover for the iphone.  

Duracell makes an inductive charger that is compatible with the Eris.  PowerMat doesn't have an Eris receiver but they have some universals.  Or you could hack your own solution.