Macsimumnews claims that the MacBook and MacBook Pro will be revised as early as tomorrow (May 6th):
Reliables sources tell Macsimum News that the MacBook and MacBook Pro will be revved as early as Tuesday, May 6. We havent confirmed this yet, but keep an eye out.
Though they describe their source as "reliable" they say that they have not confirmed this yet. The claim is somewhat uncharacteristic for Macsimumnews, who rarely posts rumors.
A MacBook and MacBook Pro release tomorrow would be a big surprise as Apple's laptops were just revised on February 26th. That being said, there had been speculation that the next laptop revisions might come quicker than usual.