The Carnegie Mellon computer science department uses a couple co-worker robots (CoBots) to act as guides and to deliver packages. They don’t have arms, though, so to use the elevator they need to ask a human for help. Maybe we could avoid a robopocalypse if more people designed robots this way. At the very least, we’d never have to worry about an android being as touchy-touchy as David 8.
In Ray Kurzweil’s The Singularity in Near, a computer avatar named Ramona becomes self-aware and learns about being human from Tony Robbins. I’m pretty sure that’s how David from Prometheus got to be so creepy weird.