iSleep Pillow
When I my brother was 15 or so, he cobbled together two soda bottle bottoms with a battery-powered radio. This whole assembly fit into my pillow so I could fall asleep to the classical radio station.
Enter, the "iSleep Pillow"! A nice, fluffy pillow with integrated speakers and battery backup into which you slip your iPod for a night of blissful sleep. Naturally this would be bundled with a CD containing MP3's of falling water, gentle rain, dolphins mating, and gentle breezes sighing through a willow tree. Ahhhhh...

