Well, the big computer security mystery of the year turned out to be just another spammers’ tool: Conficker Doomsday Worm Sells Out For $49.95.

Last night the dreaded Conficker worm finally got the update we’ve been waiting for since April 1. But cyber Armageddon will have to wait another day. The botnet, as predicted here, is now dedicated to spam.

Further disappointing doomsayers, the new download — which seems to have been first spotted by Trend Micro — took place through Conficker’s longstanding peer-to-peer functionality, rather than the DNS lookups that gave us that delicious April 1 ticking clock. Kaspersky Labs’ analysis of the new payload concludes this morning that Conficker is now serving victims a fake anti-virus product that offers to remove malware for $50.