I heard Nickelodeon was first called the Pinwheel network and then changed it's name to Nickelodeon. And I remember before the orange logo, they had a silver ball with rainbow letters. Those were good times enjoying shows like Out of Control, Dangermouse, Nick Rocks, Livewire, Kids Writes, and You Can't Do That on TV.
When I was a kid, I used to imagine Nickelodeon was a magic kingdom where characters like Ross, Christine, Dangermouse, Lassie, and the Out of Control gang all had crazy adventures together.
http://www.youtube.com/watch?v=YkxQmu3tPHI&feature=channel_page