Add servos and other items to the list and you can make anything. Even something as complex as a hexbot or biped robot.
So far I have created patterns for the EZ-1 sonar sensor and hobby servos. If I win the epilog challenge then I'd be able to do all the testing required to design dozens of new patterns for things like arduinos and any sensor I can get my hands on. These patterns will be release on ponoko or thingverse for everyone to use. The EZ-1 sonar and servo adaptors where done at ponoko but testing and prototyping is expensive and time consuming with ponoko. If I had my own laser cutter then it would go a lot faster.