Thanks for the replies- It's really helpful. Well here's what i have thought of so far…
1. A handlebar with incorporated lights. LED's poke through holes drilled in the front of the handlebar. Battery fits down handlebar tube and is screwed in place. Advantages over normal set: Can't get stolen and protected. Can also be sold as an upgrade. Aimed at commuters
2. A rear derallieur that is repositioned in the space of the chainstays therefore protected by the frame itself
3. Integrated caliper brakes in a road frame and forks. Protect brakes. More aesthetically pleasing for singlespeed/fixie guys who don't like the look of brakes
These are just ideas and i'm not sure how i could make the second two work. Any other ideas of your own would be much appreciated.
Cheers,
James