If you are a fan of twisty puzzles you may be aware of Oskar's Mixup cube seen
here:
http://www.shapeways.com/model/31732/mixup_cube.html
You may also be familiar with Aleh's 3x3x3 Circle cube seen here:
http://www.twistypuzzles.com/forum/viewtopic.php?f=15&t=11600
Well I've taken these two ideas and put them into the same puzzle. Here is the
Mixup Circle Cube: