We have created a shield and a couple of Arduino-compatible boards along with a long list of sensors and control modules that are ready to "plug and play." It is called FEZ Medusa and it ships with the complete libraries for a true plug and play platform.
The project is on KickStarter and looks like it is going to be funded in about one week. http://www.kickstarter.com/projects/1359959821/an-arduino-compatible-electronic-building-block-sy/
Originally we tested the shield with the UNO but we then tried it with the DUE and Mega and even the ADK board, all seem to work very nicely. http://www.kickstarter.com/projects/1359959821/an-arduino-compatible-electronic-building-block-sy/posts
This article found in Make will provide you with additional information. http://makezine.com/magazine/arduino-modules-fez-medusa/
We hope this will complement the great Arduino platform and modular gadgeteer, while making hardware a bit more easier for those who are not comfortable with soldering irons and wires. Please let us know if you have any comments or ideas for improvements.
Gary - GHI Electronics