There has been so much progress with electric motors and high capacity batteries finally reaching widespread use. There are kayaks with an electrict support (Torqeed here in Starnberg, that I wished to have one yesterday at Ammersee). There are engines for ultralight planes like the Electraflyer while I just read at science.slashdot about an electric airplance.
The most fascinating piece, however, I have seen last Sunday at bike expo here in Munich is a 1200 Watt kit that can be mounted on most frames of current MTBs. Tthat’s a lot of savings compared to buying a custom built e-bike like the KTM eGnition, Elmoto, eRockit, Grace or eSpire that all come at weights of 25-35 kg.
The kit will be sold by the next month by ego-kits.com while here are two pictures from the Munich fair.