Some of the Dell Poweredge servers I've been getting, have DRAC, the Dell Remote Access Console. And it's lovely.
You set it up using Ctrl-E at the appropriate stage of booting, and tell it what IP address to use. Then, I can use Internet Explorer under Windows 7 to access that IP address, and it's almost as it I were sitting in front of the computer as it starts up - all the Bios messages scroll past in a window, and I can see if there's a startup problem. So if, for example, it wants me to press a key to continue, I can do that. Even over the internet.
It's a pity I can't get it to work with Firefox on a linux box, or on Windows XT, but even though it's only usable with Windows 7 Internet Explorer, it's still very nice.