12. A computer-implemented method for capturing voice files and rendering them searchable, comprising the steps of: (a) recording audio speech data for a conversation between two or more participants, said audio speech data obtained from at least one audio-capable device; (b) storing the audio speech data in a database system; (c) selecting and loading into a speech recognition engine a grammar selected from a plurality of stored grammars, wherein said grammar is selected prior to the transcribing step and is selected on the basis of information pertaining to the subject matter or purpose of the conversation, and the identity of one or more of the participants; (d) transcribing the audio speech data into machine-readable text data using the speech recognition engine employing said grammar; (e) creating at least one data element associating the machine-readable text data with the corresponding audio speech data; (f) storing the machine-readable text data and the associated data element in a searchable database; and (f) revising the machine-readable text data by performing a subsequent transcription pass on the audio speech data using another grammar which is different than the previously selected grammar.
14. The method of claim 12 , wherein said conversation is a scheduled telephone conference, and further comprising the step of receiving from an organizer of the telephone conference information regarding the subject matter of the telephone conference such that the grammar selected prior to the transcribing step is selected on the basis of said received information regarding the subject matter of the telephone conference.