2. A system comprising: one or more sensors configured to sense one or more physical characteristics of an authoring user, wherein said one or more sensors configured to sense one or more physical characteristics of an authoring user, comprises: a functional near infrared (fNIR) device; an acquisition module configured to acquire data indicative of an inferred mental state of the authoring user based, at least in part, on the one or more physical characteristics sensed by the one or more sensors; and an association module configured to associate the data indicative of the inferred mental state of the authoring user with an electronic message.
2. A system comprising: one or more sensors configured to sense one or more physical characteristics of an authoring user, wherein said one or more sensors configured to sense one or more physical characteristics of an authoring user, comprises: a functional near infrared (fNIR) device; an acquisition module configured to acquire data indicative of an inferred mental state of the authoring user based, at least in part, on the one or more physical characteristics sensed by the one or more sensors; and an association module configured to associate the data indicative of the inferred mental state of the authoring user with an electronic message. 6. The system of claim 2 , wherein said one or more sensors configured to sense one or more physical characteristics of an authoring user are further configured to: sense at least one of a galvanic skin response, heart rate, blood pressure, or respiration associated with the authoring user.