Updates Are Good: aSleep
In my comparison of aSleep and Ambience, I found that aSleep had the edge despite having fewer sounds and features.
No longer. The update adds 50 Hi Quality Stereo Sounds, as well as a volume slider for iPod Touch Users (since the Touch does not have hardware volume controls).
It is a simple app but a nice one if you are trying to relax at the end (or even in the middle) of a long day.