Saturday night, while on the way to work, I accelerated past some slower cars going uphill, and I started to smell coolant. I also heard the belt squealing. Immediatedly thought water pump failure. I backed off the throttle as I crested the top of the incline and immediately started looking for a safe place to pull over off the freeway. As I decelerated, water temperature was rising and car started running really rough as the rpms fell off. I pulled over with flashers going and turned engine off.
Traffic too heavy so I thought to see if I could limp it to the next exit about a mile away. Car started rough and was throwing major white smoke. I accelerated to traffic speed eyeing the temp gauge which started going towards the dreaded red line. Exited freeway and made an immediated right and turned engine off again. I had a container with a little coolant in it. The overflow tank was hissing and I was pissed because I was calling work to report coming in late and they were giving me a rashing.
I walked to nearby house and they nicely filled my coolant container with water. Damn car took almost the whole container. Decided to move car to a side street as I was causing traffic to backup. Car started, billowing white smoke and I pulled into side street and shut it off. Called mechanic (Sunnyside Auto in Clackamas Oregon) and he said to get it towed over, he'll go over it first thing Monday. AAA showed in in 20 minutes, towed it to shop.
By then I finally calmed down.
Yup, I believe I got the dreaded blown head gasket.
I believe the engine running rough was coolant getting into the combustion chamber, causing the miss and all that white smoke from the exhaust.
This is going to suck, just before Christmas too.

Spoke to mechanic and he is staying away from pricing. He did say not to worry too much, worst case he says there are lots of low milage engines available for my V6. He thinks though that it may not be that bad since I didn't hear any clanking noises or seize up.
He is reserving opinion though till he sees it tomorrow.
Will update the damage report if anyone is interested.