I think the answer is no one knows yet.
Mostly what you’ll read on the forum is conjecture, since no one has a crystal ball.
Yes, people are still hosting in the u.s., but you’d be well advised to host in another country, just to be on the safe side.
My sites are hosted in Canada.
The competition is tightening considerably with the loss of google and yahoo – the race is on for SEO, and it’ll be a tough one.
There are other pay for click services, which most of us are using, I am sure.