[mellis]

I've tried to source the components using as few vendors as possible (currently DigiKey, SparkFun, and Arduino, plus ordering the PCB) but it's definitely more work than just buying a kit. I'm working on a better solution but it's probably a ways off.

[laurenstill]

Not sure about DK/SF, but Mouser lets you make public project BOM lists so users can just one click and purchase all the components.