Wow, I just got a Google Voice account. Another part of their evil plot to take over the world by doing things really, really well and for free.
But, yeah, you can call me at 773-442-2278 and if I don't answer, you can leave a voice message. It will then be transcribed almost perfectly, and sent to me as a text message.
They also have a VoIP plan with good rates. And they gave me ten cents, for no apparent reason--enough cash to call Austria for five minutes.
After further trials, when I mumble the transcription become incoherent. But, on re-listening, I had trouble understanding the message, and I had just said it myself five minutes prior.