There have been a few that have been kinda cool. Although the battery weight plus the lack of range make it kind of crappy.... A heavy car is one thing, but a heavy bike suffers badly.
This is one of the better ones:
Empulse Electric Motorcycle
Still, in my opinion, a small and light bike with middleweight power would be far more exciting. The D675 is a step in the right direction, and the new MV Agusta F3 looks like it could be awesome. Moving things toward a 250-GP style chassis with 600-class power would result in sheer brilliance.
Or this:
Aprilia News: Interview with the creator of the RSVR 550
So. Much. Want.