Lithium Ion supercaps are out now. They don't go past 270 farad ratings, and have a voltage range of 2.2-3.8 volts but charge in a minute at most. They are essentially fast charge batteries, and in larger sizes, will be a game changer.
Lithium Ion Super Capacitors - Taiyo Yuden | Mouser
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I can't wait for these things to get bigger.