Q: I lost my iPod touch somewhere in my home. Is there any possible way to set an alarm on it from the PC or somthing?
A: It is possible to do this only if you have a MobileMe subscription and have previously enabled the “Find my iPod touch” feature in your MobileMe account setup on your device.
If this is the case, simply log onto your MobileMe account in your web browser and choose the “Find my iPhone” section, which despite the name includes all iOS devices.
From here you will be able to locate your device on a map, display a message on its screen, play a sound, or remotely wipe it entirely.
Note that this feature is only available if you have a MobileMe subscription and had specifically enabled it on the device before you lost it.