Via ABG this is a pretty interesting project:
AltCar 2008: Prometheus' solar-powered electric motorcycle - AutoblogGreen
Jim Corning is owner of an Arizona
PV solar installation business, and apparently as a hobby decided to appropriate his wife's Ninja 250 and transform it into the lithium powered machine you see above. The bike project was practice for a yet-to-be built car conversion.
He uses it as a promotional tool for the business, and points out that he can power the bike for about 50 miles a day from the panels you see behind it.
Top speed is 70 mph with a range of 40-50 miles in a mix of hwy/city.
He built the fairing because he ruined a set of batteries by drawing too much current from them at highway speeds in the bike's original form and realized he needed to make it more efficient. He knows all about Craig Vetter, obviously! With the fairing, the top speed went up by 10 mph, and the current went down at lower speeds compared to the original bodywork.
There's an audio interview with the builder and a photo gallery on ABG..