I just got my shipment of Arduino clones from Modern Devices, that we posted about 3 days ago. After putting 3 together and programing them, I must say that this device is simply perfect for breadboarding. It can be powered by the breadboard, or it can power the breadboard by USB or a power adapter.
Also, I know my work area is a mess =)
Yes they do! It was those exact kits that convinced me that Arduinos was perfect for the classes here. Arduino + Processing + Wiring = simple & awesome.