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Quickest way to check if you are infected is by trying to run windows update. If you can't you have conficker.
And to the people saying "When is microsoft going to release a patch?" or "Why didn't they patch it sooner?", they patched the exploit in October of last year. They patched the...
I suggest everyone read the wiki page for it. Like Slasher said, April 1st was just a scheduled update for the worm.
There has already been several updates to the worm where a previous version has contacted a domain to receive a new payload. April 1st just marks the first time version D will...