I love things I can touch. Knobs and dials. Buttons. The Griffin 20 gives you a big honkin' dial to control your wireless music. The grace of AirPlay with the goodness of twistin' stuff.
The company's mum on pricing and availability ("soon"), but it should be worth the wait. Once you plug your AirPort Express into the 20, you'll get output for two speakers and a sub of your choice, perfect for making an ad hoc sound system for you to pour your networked library into. Or maybe you just don't want to invest a big bundle into a receiver.
EIther way, that big silver knob feels great for adjusting your tunes, and the more ways we have to use AirPlay (creatively too!), the better.