I posed this question to my friends in the Anti-Virus Information Exchange Network (www.avien.org), as I've not had a chance to play much with this new critter yet.
The short answer is that the printers/print servers appear in the Windows Network Neighborhood. One thing rarely mentioned in virus/worm descriptions is that some worms use the Network Neighborhood as their invasion map for a corporate network. The antivirus vendors typically only mention "Mapped Drives" in their descriptions.
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This was first published in October 2002