11. One or more computer-readable memory devices or storage devices comprising instructions which, when executed by one or more processing devices, cause the one or more processing devices to perform acts comprising: obtaining a plurality of text communications; filtering the plurality of text communications to distinguish a subset of text communications that share a common text string from other text communications that lack the common text string; identifying a characteristic of the subset of text communications that share the common text string; sorting the subset of text communications that share the common text string into at least a first group of first text communications having first values for the characteristic and a second group of second text communications having second values for the characteristic; generating a first summary for the first group of first text communications that share the common text string, the first summary representing at least two of the first text communications from the first group; and generating a second summary for the second group of second text communications that share the common text string, the second summary representing at least two of the second text communications from the second group.
11. One or more computer-readable memory devices or storage devices comprising instructions which, when executed by one or more processing devices, cause the one or more processing devices to perform acts comprising: obtaining a plurality of text communications; filtering the plurality of text communications to distinguish a subset of text communications that share a common text string from other text communications that lack the common text string; identifying a characteristic of the subset of text communications that share the common text string; sorting the subset of text communications that share the common text string into at least a first group of first text communications having first values for the characteristic and a second group of second text communications having second values for the characteristic; generating a first summary for the first group of first text communications that share the common text string, the first summary representing at least two of the first text communications from the first group; and generating a second summary for the second group of second text communications that share the common text string, the second summary representing at least two of the second text communications from the second group. 12. The one or more computer-readable memory devices or storage devices according to claim 11 , wherein: the first values correspond to a first time period, the second values correspond to a second time period that is subsequent to the first time period, the first group of first text communications occurred during the first time period, the second group of second text communications occurred during the second time period that is subsequent to the first time period, the first summary represents the first group of first text communications that occurred during the first time period, and the second summary represents the second group of second text communications that occurred during the second time period.