IMPROBABLE RESEARCH has a report of interest: research into motorized pogo sticks is alive and well. Delightful site, lots of neat things.
No foolin' — and Canada is doing its part, too, with Université de Sherbrooke, Canada and its PSEUS project (Pogo-Stick Extreme of the University of Sherbrooke), which you see, above. The Americans are also jumping into the act, with efforts by University of California, Berkeley, US – The Pogomatic, and Carnegie Mellon University, US – The Bowgo. Then again, maybe they got inspired by the late, great John Entwistle.