Nagios and Twitter

Following on from this post, I've got a second nagios server set up now, monitoring all the same stuff.
It's running in a VM on hardware connected to a different UPS, so that's one weakness mitigated.The other improvement is using twitter as a notification channel, as opposed to mail on the primary monitor. So if our mail service goes down, we'll know about it.
We weren't finding out before, cos the monitor was mailing us, but the mail wasn't getting through.
Reminds me of what my partner pointed out ( and that I'd not considered ) when I outlined VoIP. "But doesn't that mean that when the network is down, no-one will be able to call you to complain?". Every cloud's got a silver lining.