Going back to check the DNS history of www.sco.com, we noticed that SCO had already attempted once to bring back the site.
This happened a week earlier, on Friday the 27th of February. Back then, the site was in DNS from around 06:16 to 06:47 GMT. Then the site was out of DNS until Friday the 5th of March.
Perhaps the DDoS load from Mydoom-infected machines was still too heavy and they decided to wait another week.
---[2004-02-27 08:16:54 ] Querying round started. Using domain server: Name: NS.CALDERASYSTEMS.COM Address: 216.250.130.1#53 www.sco.com. has address 216.250.128.12