http://www.youtube.com/watch?v=ecFqCjOuncI

Not a final version yet as I'm still not happy with it when the droid speaks for the second time. I have quite a few different sound files to play with though so I'll have a more thorough stab at it soon.

The subtitles I intend to add will explain that Anakin did come back to free Shmi, but left to become a Jedi. I'm seeing the droid as a disgruntled servant much like Kreacher in Harry Potter, so he won't be very friendly.

Having such a rude protocol droid may explain why Owen has "no need for a protocol droid" in ANH ;)