1. A computationally-implemented system, comprising: means for acquiring inference data indicative of an inferred mental state of an authoring user in connection with at least a particular item of an electronic message; means for acquiring source identity data providing one or more identities of one or more sources that provide a basis, at least in part, for the inference data indicative of the inferred mental state of the authoring user; means for associating the inference data indicative of the inferred mental state of the authoring user with the particular item, wherein said means for associating the inference data indicative of the inferred mental state of the authoring user with the particular item comprises: means for including into the electronic message the inference data indicative of the inferred mental state of the authoring user, wherein said means for including into the electronic message the inference data indicative of the inferred mental state of the authoring user comprises: means for including into the electronic message inference data indicative of the inferred mental state of the authoring user that was obtained based, at least in part, on one or more physical characteristics of the authoring user sensed during or proximate to an action executed in connection with the particular item and performed, at least in part, by the authoring user, wherein said means for including into the electronic message inference data indicative of the inferred mental state of the authoring user that was obtained based, at least in part, on one or more physical characteristics of the authoring user sensed during or proximate to an action executed in connection with the particular item and performed, at least in part, by the authoring user comprises: means for including into the electronic message inference data indicative of the inferred mental state of the authoring user that was obtained based on at least one cerebral characteristic of the authoring user sensed during or proximate to an action executed in connection with the particular item and performed, at least in part, by the authoring user; and means for associating the source identity data providing one or more identities of the one or more sources with the particular item.