It would be awesome if I could somehow remotely cut the power to one of my machines for like 30 seconds (from another machine) and then have it power back up. One of my machines seems to not start
Remote power would be very nice indeed. I'm thinking for situations like lockups while on vacation etc.
I worked with Intel server boards that could do this. The technology is called IPMI. It essentially allows you to control power via out-of-band ethernet. There is also the smart UPS solution where the UPS can toggle power via a remote management card but both those solutions are server-grade and thus quite expensive.
Really all we need is power-off capability. wake-on-lan can take care of powerup.