To use the iCADE, gently slide the iPad into the cradle. The iCADE uses Bluetooth to connect to the iPad so there's nothing else you need to do. You're ready to "insert coin" and game on!
Atari providing classic games ready to go with the iCADE, including Asteroids and other top games. API to be released allowing any iOS developer to create iCADE-compatible games. Available at ThinkGeek.com.