If you're interested in knowing more about how it was 3D modeled (or about the Raspberry Pi in general) you can ask them yourself, LIVE during their regular #3DTHURSDAY Google+ hangout. It's where they talk about cool things that they've made for 3D Printing or that they've found on the web in places like Instructables.com. It's every Thursday at 3PM EST (noon PST) learn more about how to join or click the top banner. Don't be shy, we'll be there too. Pop-in, ask your questions or share your knowledge about 3D printing projects!
Some people need little introduction and Adafruit's Noe Ruiz is one of those people. His projects on 123Dapp.com stand up with some of the best we've ever seen, and that's saying something!
UPDATE: Noe is part of a Duo! Noe and his brother Pedro Ruiz get together on 3D Thursday at Adafruit to 3D model and 3D Print their projects. They often get the party started by 3D modeling in Autodesk's 123D Design. We highlighted one to start, check out Adabot!