We knew it was imminent. Now we know exactly when to expect it. Buried in the notes at the foot of the Sony press release (yes, I have been reading lots of those recently in an effort to feed your voracious minds) for PlayStation Plus is the release date for firmware 3.40.
So there you have it. Firmware 3.40 is scheduled to hit on 29th June, the same day PlayStation Plus launches. Makes sense really.