heh, if you're worried about that, here's what you need to set up.
build a website that essentially monitors your pc stats. to make things easier, you could make it WAP compliant (that way it could be retrieved from both WAP and regular http).
then, rig something up that sends an SMS to your phone if the system is outside of acceptable operational parameters.
nice thing about this setup, you wouldn't really have to freakishly check all your system's health statii all the time, you'd be notified if something failed. IMHO, that's a much better solution.
in fact, screw the web page. just give me an alert, and a way to reply to automate shutdown
dunno if it exists, but if there's a will, there is undoubtedly a way.
i know with sprint pcs, you can have basically email that goes to your phone. it's not currently giving me instant notification if i have a new regular mail tho. i'm going to talk to sprint next time i go in there see if there's a way to do that.