Sitefinder: Not Blasted.
Ross Rader points to a theory that Verisign's sitefinder may be experiencing something like a denial of service attack due to, among others, side effects from the Blaster worm's attempted attack on windowsupdate.com.
Florian Weimer rebuts that theory: The NS record continued to exist for windowsupdate.com, and that is enough to keep the wildcard from kicking in and synthesizing A records.