If you would like more information about Pope Benedict’s resignation and the process of papal transition, this webpage from America magazine’s site is a good place to start: http://americamagazine.org/papal-transition#resign.
For news in general, the America website is a good one (The magazine is published by the Jesuits): http://americamagazine.org. The Catholic News Service is another place to go: http://www.catholicnews.com/
To my mind, this is a good thing that Pope Benedict is doing. For a long time, the tradition has been for popes to serve until death. With all the complications that can arise at the end of life given our present medical technology, that tradition becomes problematic. See this article written as Pope John Paul II's decline was becoming evident: http://americamagazine.org/issue/382/article/what-if-pope-became-disabled
Pope Benedict's resignation provides a precedent for declining popes in the future and I think that will be good for the Church. It is a courageous move.