Griffin has announced two interesting iPhone accessories: the Clarifi iPhone case for the iPhone 3G and the AirCurve sound-amplifying dock.
The weirdest first: The AirCurve [pictured left] is billed as an "amplifier", but there's no electronics inside. Instead a collection of bends and turns in the acrylic — think Bose Wave radio here — directs the sound of the iPhone's built-in monophonic speaker to make it louder (in one direction, of course). I'll be surprised if the sound is improved to any degree that will provoke more than a "huh!" from me, but it's also only $20 and sort of an elegant system. One that doesn't charge your phone at night.
The other product, the Clarifi case, is pretty normal fare: industrial black rubber and plastic. Its big feature is a sliding camera lens that gives a sort of macro mode for the iPhone's camera, allowing pictures to be shot from as close as six inches away but remain clear. It's not inexpensive — $35 — and it's rare that I've found an iPhone case that is worth increasing the physical size of the device, especially since I keep my phone in my pocket, not a belt clip or bag.