Inkadinkado has a new stamping tool.
It's called Stamping Gear. Here is the Deluxe kit.
"To use, mount a stamp onto the Stamping Gear clear paddle, then stamp the image around your choice of the circle and oval cogs and wheels"
I found it at my local JoAnn's. I've been playing with it all day.
The two cards here were stamped inside the round gear.
There are other stamp sets that you can buy as well. The design possibilities are endless. I've found that any unmounted stamp, like Unity, will work as well.
These are really fun to stamp with. I do have a couple suggestions for them though. One is to make a long bar to stamp images in a straight line. The other is to make more smaller images.