Ah, we've already got some
They're called "Cunt-O-Tron" and run on staggering amounts of money as an endless power source. You can only get them on a four year lease contract though, plus they seem to rebel against their human masters for three of those four years.

They can be heard endlessly repeating words like "Prudence!" and "We're listening!" and comes in several distinct types, including the "Milli-Driod" with "Gaffe Ver2.5" software installed, "Harmorrhoid" with "Rabid Harridan vers 1" and optional extras include light up red eyes.

My favorite though is the "Cameroid" which is programmed to give non-committal answers to every single question and seems to be affected by the "cycle-the-wrong-way" bug.

However, I hear that "Darlo-Droid" may be withdrawn due to being quite obviously less than lifelike.
(Bicycle Repairman "you're also a bit of a wanker", Mon 4 Aug 2008, 16:48, Reply)