One of my favorite unpowered amplifiers is Griffin's AirCurve, and at $5 more this $25 gramophone horn looks worth it. It'll add 12db of sound to the speaker, and even acts as a stand too. [CyberGuys via BookOfJoe via Wired]
Am I missing something?
The description makes it sound like this makes the phone's speaker (where sound comes out of the phone) louder, but it's affixed to the bottom of the phone, where the microphone (where the sound goes into the phone) is located.
In the orientation shown, it seems to me like it would just make the person talking into this phone sound like they're shouting to the person on the other end.