...That's where the Internet shutdown comes in. The FBI has a court order allowing it to set up temporary replacement DNS servers so that those with infected computers or networks can get the worm off of their systems. The court order, however, expires on March 8th. Unless that order gets extended, anybody who hasn't cleaned up their act before it expires, might get cut off from the Internet altogether.
Luckily, it turns out kicking DNSChanger is manageable—as long as you know you've got a problem. To learn more about checking your computer or network for the Trojan check out the DNS Changer Working Group and the FBI.
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