Another thought, gleaned from other threads and blogs: a permanently plugged in N900 as a security camera, either permanently recording (starting a new file each hour, for example, and deleting the oldest one after a predefined period) or on some sort of trigger, either when a sound threshold is reached (a la Babyphone) and/or when the camera's input changes (eg a significant difference between 2 frames; I have no idea how difficult that would be to code.) This last is where it gets more fun. The device's wi-fi is of course on - what, you thoght storing security footage on the device only, which an intruder could nick, was a good plan? That's what the cloud's for. On trigger, the device could send a message via any one of a plethora of protocols, alerting you. Could we stream the video across the net to see what's happening? Of course, the low-light video mode's not much cop, so why not have the trigger also have the device tell wi-fi controlled lights to come on, both to give a better view and to startle any intruder?