If you set your domain to our nameservers there is nothing for you to do but to wait for your IP to be changed and DNS propagation to happen.
Again - if you are not using our nameservers and you are using third party DNS - you would know this and, as such, wouldn't have any questions. If you don't know - then you're most likely not using third party DNS because third party DNS is a technical process that requires a good understanding of DNS.
Thanks for the info, Mike. I am familiar with what I call "third party DNS" - Google Public DNS and OpenDNS, both of which I have used in the past, although now I am currently using Level3 as I discovered that OpenDNS takes forever to update. My sites have been back up for a good while now, so I'm assuming you are talking about something else when you refer to "third party DNS." Whatever it is, I much appreciate all your hard work! Thanks.