No sé si será esta o no (20070061297), pero algunos de sus claims más interesantes:
Cita: 14. The computer-implemented method of claim 12 wherein the positive indicators include one or more of a popularity of the blog document, an existence of a link to the blog document in one or more blogrolls associated with other blog documents, a tagging of the blog document, a reference to the blog document in other documents, or a pagerank of the blog document.
15. The computer-implemented method of claim 12 wherein the negative indicators include one or more of a frequency with which posts are added to the blog document, a size of posts in the blog document, a link distribution associated with the blog document, a quantity of ads in the blog document, or a location of ads in the blog document.
16. The computer-implemented method of claim 12 wherein the negative indicators include an indication of a mismatch between a content of the blog document and a content of a feed associated with the blog document.
17. The computer-implemented method of claim 12 wherein the negative indicators include an indication that the blog document includes a high percentage of predetermined words or phrases.
18. The computer-implemented method of claim 12 wherein the negative indicators include an indication that the blog document includes duplicate content.
25. The method of claim 24 wherein the one or more positive indicators include one or more of a popularity of the blog document, an existence of a link to the blog document in one or more blogrolls associated with other blog documents, a tagging of the blog document, a reference to the blog document in other documents, or a pagerank of the blog document, and wherein the one or more negative indicators include one or more of a frequency with which posts are added to the blog document, a content of the blog document, a size of posts in the blog document, a link distribution associated with the blog document, a quantity of ads in the blog document, or a location of ads in the blog document.
27. A method comprising: identifying at least one of positive indictors of a quality of a blog document or negative indicators of the quality of the blog document, the identified at least one of positive indicators or negative indicators including an indicator specific to blog documents; determining a quality score for the blog document based on the identified at least one of positive indicators or negative indicators; receiving a search query; determining a score for the blog document based on a relevance of the blog document to the search query; adjusting the score of the blog document based on the quality score; and providing information relating to the blog document based on the adjusted score
Vamos, lo típico...
Faltaría leerse ahora la patente entera...
Edito: pues tampoco es tan larga, si es esta a la que os referís, y alguna cosa podría sacarse de probecho. Aunque como en todas las patentes, hay que saltarse la introducción, leerese en diagonal la paja, e ir a la parte interesante (pag. 12-13, determining a quality score for a blog document)
Dejo el link: worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=2007061297A1&KC=A1&FT=D& ND=3&date=20070315&DB=EPODOC&locale=en_EP