July 16th through the 2oth represent the 40th Anniversary of Apollo 11, the first manned mission to land on the moon. There are many happenings on the internet to help you celebrate and learn more about this great achievement. Here are a couple to help you get started.
WeChooseTheMoon.org has virtually recreated the mission online from launch to landing. They have a mission tracker (online and downloadable), countdown clocks to the next stage and landing, live streaming audio, twitter feeds for @AP11_Capcom, @AP11_Spacecraft, and @AP11_Eagle.
Universe Today created the Apollo 11 Anniversary Link-O-Rama page with links to the original, video, audio, and transcripts, as well as the official NASA websites and some other miscellaneous items such as poetry and how to answer moon-landing hoax questions.
NASA has put up images of the Apollo landing sites taken by the Lunar Reconnaisance Orbiter (LRO) last week. http://www.nasa.gov/mission_pages/LRO/multimedia/lroimages/apollosites.html