In a recent Reuters interview, Sony president Ryoji Chubachi said, "we've announced the price cut in the US and have no additional plans beyond that at this time." Um, okay. They DID just announce the PS3 price cut two weeks ago. Dropping the price again so soon would be quite silly (at least, from a business standpoint).
Or, and this is just a crazy theory of ours, maybe he is pre-announcing another price cut, by way of saying there isn't one, when it's already planned, right around the upcoming holiday season. Stranger things have happened, but looking back at all the price cut denials before the announcement of the $100 price cut before E3 certainly makes it seem all the more plausible.