NASA has announced that they have a nearly working prototype of a "PSA", personal satellite assistant designed to move semi-autonomously in the weightlessness of the space station. Despite looking like a large version of the jedi training sphere seen in the first Star Wars movie, it reportedly has no laser blasts. Instead it can be used to assess environmental conditions, help astronauts with experiments, and even video conference with Earth. See this
Wired News article and go
straight to the source at NASA.