It turns out that the Conficker virus wasn’t as big a dud as originally thought. It’s slowly being activated:

A malicious software program known as Conficker that many feared would wreak havoc on April 1 is slowly being activated, weeks after being dismissed as a false alarm, security experts said.
[…]
Conficker installs a second virus, known as Waledac, that sends out e-mail spam without knowledge of the PC’s owner, along with a fake anti-spyware program, Weafer said.
[…]
The Waledac virus recruits the PCs into a second botnet that has existed for several years and specializes in distributing e-mail spam.
Conficker also carries a third virus that warns users their PCs are infected and offers them a fake anti-virus program, Spyware Protect 2009 for $49.95, according to Russian-based security researcher Kaspersky Lab.

That’s actually pretty helpful, it lets you know that you have a problem. Usually when you become a spam bot you have no idea.