I think not, and not just because of the recent Montevina delay.
The first rumors of a new MacBook Pro and MacBook form factor came from AppleInsider almost two months ago (April 7th). Since then, we have heard nothing. No hints of a new form factor at the supplier. No grainy cell-phone "sneak peaks" of a case. No mysterious orders placed or shipped. No sudden super sales to clear out current stock. Even AppleInsider's article said it was more likely to happen in Q3 since the new mobile 45nm Penryns have been running late due to a slower-than-planned ramp of the fabrication facilities.
So we now have a new rumor of new MacBooks coming in late August, which leads me to believe new MacBook Pros will come a week or two before that. I wish I could wait, but I can't, so I've committed to the current MBP line.