Nope, generally there is no way to reboot your MCPC remotely, for this (and similar tasks that need root permissions) you should file a bug entry in the bugzilla system under "MARC administration needed" - someone at Intel will then do it...
Philipp is correct. Intel does respond in a timely manner. But please realize that our response is during our business hours (8AM to 5PM PDT). PDT is Pacific Daylight Time. We go to PST on November 2, when we push our clocks back an hour.