Reading lists are OPML documents that point to RSS feeds, like most of the OPML documents you find, but instead of subscribing to each feed in the document, the reader or aggregator subscribes to the OPML document itself.
DiSo (dee • zoh) is a new umbrella project for various open source social networking components that we’re working on. In the beginning, we’re largely targetting Wordpress, building on the work Will Norris‘ has done with his excellent WP-OpenID plugin
R. Abbasi, S. Chernov, W. Nejdl, R. Paiu, and S. Staab. Advances in Information Retrieval, volume 5478 of Lecture Notes in Computer Science, page 654--661. Springer Berlin / Heidelberg, (2009)
A. Ankolekar, M. Krötzsch, T. Tran, and D. Vrandecic. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 825--834. New York, NY, USA, ACM Press, (2007)
F. Flores, V. Quint, and I. Vatton. DocEng '06: Proceedings of the 2006 ACM symposium on Document engineering, page 188--197. New York, NY, USA, ACM Press, (2006)
H. Halpin, and H. Thompson. WWW '06: Proceedings of the 15th international conference on World Wide Web, page 679--686. New York, NY, USA, ACM Press, (2006)