Walking down one of the less trafficked pathways on the show floor I came across Ten One Design's booth. The company just launched a nifty little thing called the , which it bills as a "passive sound enhancer for iPhone 3G."
Or to put it another way: SoundClip is a little bit of plastic that clips onto the dock connector and funnels the sound from the bottom-facing speakers of the iPhone toward you.
Ten One claims you'll get a 10dB gain for sounds between 5kHz and 20kHz. I don't know about that, but if it enhances my gaming experience with , this add-on is well worth the $8 price tag. (And if you're on the Expo showfloor, you can pick one up at the discounted rate of $5.)