There was a Yahoo! featured article on this a few days ago. I think they said the easiest (and possibly the most reliable) way to check for a Conflicker infection was to reboot in safe-mode. Conflicker supposedly blocks that, but googling Symantec's website seems just as easy.

It's already 8:55pm April 2nd here, so if something was supposed to hit, we'll probably know about it (if it's automated to occur local time).

On a slightly different topic, is there any real way to find out if your computer is being used as part of the Storm Botnet?