Griffin Technology will unveil a handful of new, innovative iPod products at next week's Macworld Conference & Expo in San Francisco. Griffin will debut the SmartDeck audio cassette adapter for third- and fourth-generation iPods as well as iPod minis. The new accessory will allow users to use their own stereo's transport buttons--such as fast-forward, rewind, next song, previous song, etc.--to control an iPod. The SmartDeck should be compatible with virtually any cassette deck. The final version of the product may also ship with other features such as the ability set the iPod's volume for optimum output.