Launched on March 10, 2009, D23 is the first official community for Disney fans.
One year, gold, membership is $74.99 plus tax. For this you receive a membership card, four issues of twenty-three (the clubs magazine), a certificate, access to member benefits, and more. There is also a silver membership for $34.99 plus tax that includes everything except the twenty-three magazine.
Click here for my overview thoughts on D23
FYI the name comes from the fact that the Walt Disney Company was founded in 1923 (October 16th to be exact).