19. A computer program product for scoring a plurality of documents, where at least some of the documents are characterized by at least one link from at least one other of the documents, the computer program product comprising at least one tangible computer-readable medium having computer program instructions stored therein which are operable to cause at least one computing device to: for each of at least particular ones of the plurality of documents, assign a score to that particular document, with respect to a particular topic, based at least in part on a characterization of topic incoherency associated with at least one document linking, from the at least one document with which the characterization of topic incoherency is associated, to that particular document, wherein the characterization of topic incoherency of the at least one document linking, from the at least one document with which the characterization of topic incoherency is associated, to that particular document is an indication of an amount of topic-specific score authority for each of multiple topics of the at least one document linking to that particular document, wherein the higher the topic-specific authority for each of multiple topics of the at least one document linking to that particular document, the indicated topic incoherency associated with the at least one document linking to that particular document is higher; wherein the score assigned to that particular document is reduced based on higher topic incoherency of the at least one document linking to that particular document; and wherein the computer program instructions are further operable to cause the at least one computing device to determine a value indicative of a probability of not linking to any of the at least particular ones of the plurality of documents: and account for the determined value with respect to scores of documents other than the at least particular ones of the plurality of documents.
19. A computer program product for scoring a plurality of documents, where at least some of the documents are characterized by at least one link from at least one other of the documents, the computer program product comprising at least one tangible computer-readable medium having computer program instructions stored therein which are operable to cause at least one computing device to: for each of at least particular ones of the plurality of documents, assign a score to that particular document, with respect to a particular topic, based at least in part on a characterization of topic incoherency associated with at least one document linking, from the at least one document with which the characterization of topic incoherency is associated, to that particular document, wherein the characterization of topic incoherency of the at least one document linking, from the at least one document with which the characterization of topic incoherency is associated, to that particular document is an indication of an amount of topic-specific score authority for each of multiple topics of the at least one document linking to that particular document, wherein the higher the topic-specific authority for each of multiple topics of the at least one document linking to that particular document, the indicated topic incoherency associated with the at least one document linking to that particular document is higher; wherein the score assigned to that particular document is reduced based on higher topic incoherency of the at least one document linking to that particular document; and wherein the computer program instructions are further operable to cause the at least one computing device to determine a value indicative of a probability of not linking to any of the at least particular ones of the plurality of documents: and account for the determined value with respect to scores of documents other than the at least particular ones of the plurality of documents. 21. The computer program product of claim 19 , wherein: the computer program instructions operable to cause the at least one computing device to assign a score to a particular document, with respect to the topic, based at least in part on a characterization of topic incoherency associated with at least one document linking to that particular document includes: computer program instructions operable to cause the at least one computing device to assign a score to that particular document, with respect to the topic, based on the score, with respect to the topic, of each of the at least one document linking to that particular document, weighted by the characterization of topic incoherency associated with the at least one document linking to that particular document.