Ok..i'm not sure if you can do this but..

We have a server at my company that is running a lot of services like mail, web, etc. We're trying to make a disaster recovery plan where we have 2 ISPs in case of an emergency.

Would it be possible to have a website like www.google.com resolve one public IP address and if that fails resolve another IP address? It's like linking 2 IP's to one DNS name. I understand that round robin dns does something like this but is only used for load balancing and not disaster recovery where if one IP goes down, the other IP will take over, but both will be listed for one DNS name. Anyone know how we can do this?