This 1:1 scale R2 D2 from Sideshow Toys looks, and apparently sounds, amazing:
The Limited Edition R2-D2 Life-Size Figure features a brand new sculpt of our old friend. More realistic than ever before, this representation features screen accurate lights and sounds. The lights and sounds can be triggered with the included remote control that stores in a hidden compartment just next to the speaker. For those wishing to add even more depth to the story of R2, his dome can be rotated to the right and left, along with the holographic projectors.
That level of detail doesn’t come cheap–list price for this is $7,450 plus $250 for shipping within the United States. Sideshow Toys, you’re our only hope.