Here is a full summary...
Sleep.FM - The Social Alarm Clock is an alarm clock social network, where upon the alarm time passing on the site(mobile versions soon) you are awakened by your alarm messages(audio files or voice-mail) received from your friends on the network.
It is themed around the human conditions of resting and waking where user environments are bedrooms. Users interact with one another by entering each others bedrooms to leave one another gifts(with or without comments), emails and or alarm messages.
The back button issue.. does that happen on the splash page or when you click, "Already a member? Click here," which takes you to another page?
Thanks!