Blown engine? HELP!

[EveryShadeofBlue]

Sad day folks. I'm driving and floor it to pass someone. Power light comes on, everything's ok. The car starts vibrating a few minutes later, when I let off the gas. When I step on it, it seems ok. Next thing I pull into my brother's driveway a minute later and white smoke is pouring out of the tailpipes. Now the car won't start, it tries to turn over but produces nothing but puffs of white smoke out of the tailpipes.

Any ideas anyone? I would love to say it's the transmission since I have a warranty, but it sure seems engine-like to me. There's plenty of oil and nothing is leaking. Maybe a water pump? I'm brainstorming. HELP!!!

Jeff