I have something similar setup, albeit a mite more complex. I, too, have X-10 setup but I also got a freebie motion detector. I figured I might as well put it to some use, so I decided to make an alarm clock (no, more alarm SYSTEM) that used it. The way it is configured now, I have the motion detector near my computer where it cannot see the bed (very well (I need to block its range a bit more)). the alarm system is just a big ol'e perl script that gets activated by a cron job and turns on a bunch of noisy/bright x-10 devices. the catch is that it checks the motion detector until it actually detects movment (as in I actually got up). the system also, just to top things off, checks a list of holidays to see if it should actually bother waking me up and best yet: checks for school closings (snow days). now all i need to do is have it tilt up my bed, drop me through the floor and into some nice, mechanical trousers. oh, wait, that's already been done ;-)