CoolRunnings, in the UNIX world, we have serial consoles. On everything. RS-232. ANSI/EIA standardized. Very simple. Works really well from remote.
My point is that the PC world (hardware vendors + OS vendor "M") have a long long way to go in remote management, and that's why we have to ship a virtual keyboard and video display across a WAN to remotely manage PC servers effectively.
Various PC vendors and third-party products have attempted to do serial management, but they all are so-so solutions. Part of the problem is that there are several different parties to the problem, all of whom don't really understand. If Intel + Dell + Microsoft put their minds to it and bought a few Netras to reverse engineer, they could make this work.
(I use Sun as an example partly in jest, since for many years they had problems with serial consoles, but eventually during the Internet bubble they realized how much money there was in just having boxes that were really remotely manageable... so they learned right quick).