History of the Internet on Wikipedia
The wikipedia article on the history of the internet I found was very thorough on covering the complete timeline of the internets development and lifespan since its inception in the late 1950s. It looks at a lot of the precursors of the internet that were developed in the mid 20th century that I have never read about or even heard about in some cases. It seems as though it has been kept up to date and edited thoroughly since its creation with the last edit being only a few days ago (9/20/2012). The last major addition was on September 8th. Since this is a more modern topic it is not surprising that things are constantly being added to this article especially since we are constantly redefining and improving upon the technologies that we see in the internet.
The article contains 109 sources, more than I have personally seen on most wikipedia articles but this is more common for an article on a historical topic. Many sources are from scholarly journals, magazines, newspapers, and websites. There are quite a few charts throughout the article as wikipedia likes to do that basically illustrate the same thing, that the internet has been exploding over the past 20 years since it became a public thing.
Link to article: