10. A system comprising: a processor; and a computer-readable storage medium having instructions stored which, when executed by the processor, cause the processor 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 identified key phrase; and instructing the personal communication device to display the advertisement.
10. A system comprising: a processor; and a computer-readable storage medium having instructions stored which, when executed by the processor, cause the processor 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 identified key phrase; and instructing the personal communication device to display the advertisement. 12. The system of claim 10 , wherein the personal communication device is a converged voice and data communications device connected to a network.