Remote control of GRUB?

Is there any way to remote control GRUB? I am interested in not having to walk to the machine when it reboots. As such, I am only interested in non-virtualized solutions. In particular, I want remote access to the GRUB console. The ability to select an entry, or edit the options, or even do something completely new. In short, full control. I would be interested in solutions involving VNC, SSH, telnet, or even raw network connections (via netcat or the like). Or something else if there is such a (software) solution. (Security is not *yet* a concern.) Note that I'm not interested in remote control of the booted OS. I also want more direct control than grub-reboot provides. Since everyone is suggesting it: I am **not** interested in a device specific **hardware** solution. I want something I can install on dozens of machines in their GRUB configuration to allow their GRUB boots to be remote controlled.