Google Scribe is an experimental engine which autocompletes entire words based on previous input in a text box (I suspect it's a Markov chain-like system powered by Google's corpus of text). It's also a perfectly serviceable surrealistic text generation tool; start writing something, then at some point, just hit Enter on the autocompleted choices until you have enough, and you might get a rambling, whacked-out monologue like this:
Now watching in the New Yorker and the New York Times Company will answer questions about their own lives and their communities together with their respective organizations and to their families and friends of these two types of information that is not appropriate for all users of the catalogue should also be noted that there is anything you would not believe how much I loved them all and I'ma let you finish but Beyonce had one of these days I'll bet your life on the road today and they are nothing but another form of therapy for these patients is not known whether these are the only ones who can not afford to pay for their own users and groups to their Friends
http://www.emacswiki.org/emacs/PredictiveMode
Emacs alreday has it...