Matthew, (and everyone still having this issue)
The person to CALL and chat with is: Ation Gilliam, JSAI - System Admin Team - but first ask for Harold, the Supervisor, as he knows this first hand and can get you the right help in short order. *chuckle* Tell him 'Joe from Fez-o-rama said...' - that will win me over friends.
From what I've gathered and had the experience with (with Griffin and Stefy - both Breeze) is that AG has to manually insert the URL's into 'something' (DNS resolver?) for the server to see an external site on the API call. (resolv.conf perhaps?)
One thing he mentioned which bring this all back to that San Diego switch debacle, is that all the servers NOT in San Diego are fine...
I'm curious of two things - how many servers are in San Diego and why can't they task the Admin on duty with going through a check list of said servers and enter this on each one - until the other techs figure out what switch entry is causing this.
Also curious as to what exactly AG did - as the Zencart community is asking and likes to openly share knowledge of such 'stuff' so if it ever happens again - downtime (and lost sales) can be minimized. And yes I can quantify at least $1,635 (+/-) in lost sales from my two sites. What's LP going to do about that? One should hope a few months of hosting at the least.
AG!!! Let us know!!! Or, anyone else who gets details, please post them up here!