Basic Definition:

A Round Robin, or a Progressive Quilt, is a quilting project involving a small group of people who progressively work on the quilt tops as they're being passed around. Let's say you have 5 people in the group. Each one makes a block which will be the center of the quilt, then passes it along to the next person on the list. Then each person adds one border and passes it along to the next person on the list. The circle has completed when the tops are passed to the person who made the center. Now each person has a wonderfully unique top with borders from each of the others in the group.

This method often proves challenging because a suitable border must be made to compliment the rest of the quilt, and it will force a quilter out of their normal color schemes and patterns to create something suitable.

Here is an example from a group of quilters on the Microsoft Network.

A group of ElectricQuilt 3 users got together and formed another progressive and here are some tops that resulted from that: