Has anyone seen the saltcube LD tutorial videos? I downloaded the video a couple of months ago and it has something similar to this but instead of just "waking up" once, they give you a timer that beeps multiple times, every certain minutes (for instance, you can adjust it to beep once every 20 minutes) so you can have multiple short LDs but with a higher possibility of having one (since you have more chances to try to "wake up" without moving your body).

Here is the timer if anyone wants it:
http://www.megaupload.com/?d=XR03EP64