A few months ago while browsing in the electronics section at my local Walmart I saw this cool little iPhone dock. I know what you're saying, everybody and their brother has came out with an iPhone dock. But this one is completely different.
This little $20 piece of plastic has no electronics yet it claims to boost the audio of your iPhone do to a wave-guide design. As your phone sits in the cradle of this dock the speaker of the phone is in direct contact with the start of the wave-guide and as sound comes from the iPhone speaker it is pumped through this little tunnel. The sound quality is very nice and the clear plastic design is very pleasing to the eye.
This dock is made by Griffin Technology and is actually called the AirCurve Acoustic Amplifier.
Note: It will accept a sync cable so you can charge or sync your iPhone while it is securely sitting in the AirCurve.
Head on over to http://www.griffintechnology.com/products/aircurve and take a look. I highly recommend it.