Check this one out, lights, computer GPS, handlbar bag. Not bad.
Then there's this: video camera, computer, GPS, light and snack bag, all nicely mounted and close at hand. I like this setup not only because it lets you film as you ride, but because the handlebars remain relatively uncluttered.
Of course my own setup is a work in progress, but a handlebar bag and a light mount on the bag support keeps things elegant. I have my eye on one of those fancy cameras and maybe a GPS, so no doubt things will change over time.