Since I know some avid readers of this blog have purchased SleepTracker watches to wake up more easily, and there was some discussion of using the iSight built into Power/MacBooks to do the same, I just discovered Dream Recorder on VersionTracker. Not sure how it handles two people in the same bed though, I guess you just have to aim the camera carefully.
Let me know if it works (or broadcasts pictures of your bedroom over the internet 
