The Yahoo! Webscope™ Program is a reference library of interesting and scientifically useful datasets for non-commercial use by academics and other scientists. All datasets have been reviewed to conform to Yahoo!'s data protection standards, including strict controls on privacy. We have a number of datasets that we are excited to share with you. Learn how to get involved.
D. Donato, F. Bonchi, T. Chi, and Y. Maarek. Proceedings of the 19th international conference on World wide web, page 321--330. New York, NY, USA, ACM, (2010)