17. A system comprising: a client device adapted to display at least one display element for which input data is receivable though a visual modality and a voice modality and, when the input data is received through the voice modality as speech, to send uplink audio data representing the speech to a voice server over an audio data path between the client device and the voice server; the voice server adapted to determine, based on the uplink audio data, whether the speech is recognized, and when the speech is recognized, to send an indication that the speech is recognized to an application server over an application server/voice server control path between the application server and the voice server; and the application server adapted to receive the indication that the speech was recognized, and based on the indication, to send a speech recognition result to the client device over an application server/client control path between the application server and the client device, wherein the application server/client control path is distinct from the audio data path.
17. A system comprising: a client device adapted to display at least one display element for which input data is receivable though a visual modality and a voice modality and, when the input data is received through the voice modality as speech, to send uplink audio data representing the speech to a voice server over an audio data path between the client device and the voice server; the voice server adapted to determine, based on the uplink audio data, whether the speech is recognized, and when the speech is recognized, to send an indication that the speech is recognized to an application server over an application server/voice server control path between the application server and the voice server; and the application server adapted to receive the indication that the speech was recognized, and based on the indication, to send a speech recognition result to the client device over an application server/client control path between the application server and the client device, wherein the application server/client control path is distinct from the audio data path. 19. The system of claim 17 , wherein the client device is a device selected from a group of devices that includes a cellular telephone, a radio, a pager, a personal data assistant, a personal navigation device, a mobile computer system, an automotive computer system, an airplane computer system, a compute, a laptop computer, a notebook computer, a desktop computer, and a voice over internet protocol (VoIP) phone implemented on a computer.