15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising: generating text based on speech contained in an audio stream received via a personal communication device associated with a user; identifying a key phrase in the text based on one of an emotion, a speech rate, and a prosody of the key phrase in the audio stream; receiving from an advertiser an advertisement related to the key phrase; and instructing the personal communication device to display the advertisement.
15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising: generating text based on speech contained in an audio stream received via a personal communication device associated with a user; identifying a key phrase in the text based on one of an emotion, a speech rate, and a prosody of the key phrase in the audio stream; receiving from an advertiser an advertisement related to the key phrase; and instructing the personal communication device to display the advertisement. 16. The computer-readable storage device of claim 15 , the computer-readable storage device having additional instructions stored which result in the operations further comprising: receiving from the advertiser a set of rules associated with the advertisement; and instructing a second device to display the advertisement in accordance with the set of rules.