This is a transport system based on the Stargate series allowing gates to connect to each other based on a nine item combination.
Current features include
Downloads
Problems & Feature Requests
Forum
Creating a gate
Using an Iris
Commands
Settings
Permissions
Gates-Spout Integration (AKA Give me the sound effects!)
http://code.google.com/p/minecraft-gates/w/list
This video covers how to create a basic gate and use it.
Want sound effects and a customised interface? Check out Gates-Spout Integration