Cliff Mellangård, Swedish 3d printing guru and creator of excellent low cost Funbot 3d printer is developing an all-in-one DIY RepRap based on Raspberry Pi 2. It has a 7 inch LCD screen and when you connect external keyboard and mouse you have a full 3d printing workstation in one machine.
Here is the Funbot Pro presentation video:
Nice work Cliff! Files for it will be probably available soon since it is still in early development stages.
Here is the first real print of FunBot Pro with further details explained by Cliff: