I just designed a logo for Catapult Online for their Catapult Kids brand. I'd already designed the kids for their Holiday Card and mousepad jobs, and now they wanted them to become part of a new logo. The logo has more variants than a 90s Marvel comic. There are full color (pictures), limited color, two color, gray, and black and white versions, along with versions that include the kids and versions without.
My theory, being a former newspaper guy, is that no matter how cool your logo, eventually it's going to run an inch high in black and white on newsprint. So I always design with that in mind. Clicking on the large logo to the left will bring up the color versions, clicking here will bring up the black and white variants.