Spotted in the MAKE Flickr pool:

Flickr user llemarie wanted an easy way to upload programs to an Apple I replica computer that he was building, because typing them in by hand was tedious and error prone. To solve the problem, he used an Arduino to build this ASCII keyboard emulator, allowing him to copy and paste programs over to the computer with ease. Of course, it’s kind of funny to use two powerful computer to program one hobby computer, but for expediency it can’t be beat.