Grandpa Bill's general authority page is a comprehensive online biography of every General Authority of The Church of Jesus Christ of Latter-day Saints who has ever served in this dispensation. Often, an internet search for information on a specific general authority will bring up his site first.
Grandpa Bill cites Ensign and Church News articles about the General authorities as well as historical records of the LDS church for some of the older brethren. There is also a history of the various quorums. There is also news and notes from recent General Conferences. Grandpa Bill uses personal testimonies and experiences from various leaders of the Church he knows personally, as well as other church-related material on his site.
Wikipedia and several other online sources quote Grandpa Bill, when they source articles relating to brethren who serve as General Authorities.
Here is a link to his most current site [http://www.gapages.com]