OOB customer communications (Re: Looking for Support Contact at Equifax)

[mike at rockynet.com (Mike Lewinski)]

We're experimenting with Twitter as a means to communicate anytime there 
are system-wide outages (in addition to regular maintenance 
notifications). Adoption is slow but I foresee growth once we really get 
the word out.

Being a data and VoIP provider, certain events can effect both email and 
telephone communications, so having a truly OOB method of contact is 
potentially invaluable.

It would be awesome if there was a service like twitter that wasn't down 
as often as it is.

Anyone have a list of all xSPs using Twitter?

Mike