As cool as the iPad is, the rear-facing mono speaker is utterly awful and it either needs to be connected to an external speaker or a hand needs to be cupped over it to redirect the sound - which seems to actually work well. The cool new Amplifiear does this for you. Just clip this ear-shaped plastic disk thing to the speaker corner of an iPad and it will deflect the sound forward increasing the volume by up to 10 dB without power. An ingeniously simple solution, but come on already Apple!!!
AmplifiEAR - Ear-Shaped iPad Audio Amplifier