We will investigate the screen locking issue. This is the first we have heard of this issue. Please know that this is our first release for Windows mobile and it's a new platform for our product. The iPhone version has had numerous updates over the past year as it is our most popular version.
The media player does not allow for true looping, you'll notice it has a gap of silence when it repeats which is typical of most media players. The White Noise 2 product probably was given a bad name as it is not an upgrade but a whole new set of sounds. Think of it as two different albums. I hope that helps answer some of your questions and we will look into screen locking issue.