Try out Google Docs new demo that lets you write collaboratively with your favorite dead famous writers. Then you get to save and share your creation.
As Next Web explains:
A "famous writer" will start typing and then it's your turn. Once you've typed in the next line, the writer takes over
There are a couple of other companies doing audio search indexing, one from Germany the name of which escapes me now. I see an application in this for languages.