All of those running PPC campaigns and freaking the fuck out about a network going down, I've got a suggestion for you:
Uptime tracker for your networks.
Slap on some tracking that has a <5minute tracking updates, and get it to send you an SMS when shit goes down.
That way, you'll have only lost 5-10 minutes worth, while you frantically pause all of your ads, and then it'll SMS you when it's back up, meaning you don't lose out when the traffic's worth sending again.
Only way you'll get caught with your pants down is when you're already in a situation that involves having your pants down.