This article by Jon Udell is a really scary look at the future of audio processing.

Cheap storage makes it feasible to save voice recordings of many of our meetings, teleconferences, interviews, and other conversations. In some environments -- call centers and certain sectors of finance and government -- that already happens. But audio surveillance isn't yet routine, and the thorny legal, social, and cultural issues it raises haven't yet been widely debated. That's because, until now, there was no practical way to mine voice data.

As with other forms of practical obscurity, this artificial barrier was bound to topple, and now it has. Fast-Talk Communications' revolutionary phonetic indexing and search technology brings the magic of full-text search to the formerly opaque realms of audio recordings and video soundtracks. If you consider the way in which Google has already become everyone's indispensable "outboard brain," and extrapolate that to all the voice data that exists -- and to the vast quantities that soon will exist -- it's hard to avoid the conclusion that Fast-Talk is one of the most disruptive technologies in the pipeline.