Lyrebird:

Lyrebird will offer an API to copy the voice of anyone. It will need as little as one minute of audio recording of a speaker to compute a unique key defining her/his voice. This key will then allow to generate anything from its corresponding voice. The API will be robust enough to learn from noisy recordings.

This is fascinating and scary. The technology is far from perfect, but I can definitely see them getting to “close enough to fool you” pretty quickly.