Chief O'Hara, To The Batphone!
Just what you really need, your own personal Batphone. Straight from the 1966 TV series, MillionairePlayboy.com has complete instructions (quite complete actually) on how to build your own. They even include a shopping list. If that's not enough Batmania for you, check out the Batman News Network. Ever wonder how they kept the location of the Batcave secret from the telephone guys who laid the cable?
P.S. If anyone has a copy of the 1966 Batphone sound, please post a link. The one in the article isn't right.