A method of and system for collecting data from multiple sources and improving the ranking and matching of documents based on meta data obtained during data collection, sorting and review processes is disclosed. Incentives are provided to contributors in exchange for data/documents that have been acquired...http://www.google.de/patents/US20050216295?utm_source=gb-gplus-sharePatent US20050216295 - Method of and system for obtaining data from multiple sources and ranking documents based on meta data obtained through collaborative filtering and other matching techniques