I have found this website to be a very useful source of information on the economy, gold, and silver.
http://goldismoney.info/forums/
Gold is a mostly useless metal, which has magical properties and sparks irrational desire to own. So long as irrationality rules, Gold will have value. Since this irrational obsession with soft shiny metal has lasted for thousands of years, one could expect it will last a thousand more.
On the other hand, as someone said, the bubble is biggest before it bursts.