I know Saleen has done a bit of racing in Europe with the S7R (he's entering Le Mans again this year), but are there any plans to sell it there?
Also, as was alluded to earlier, the S7 is pretty much identical to the S7R. They are built side by side in the factory, I think the only real differences are engine and interior. Amazingly enough, the road car is actully more powerful than the race car.
I wouldn't bet on it being faster in terms of top speed, but around the Top Gear track, I think the S7 turbo would be just as fast as the Koenigsegg. Every published figure I have seen about it (and I am talking magazine test figures, not made up publicity numbers) has been as good or better than cars like the Enzo, Zonda, Koenigsegg, and Carrera GT. It may be a lot less refined for passenger comfort, but Steve Saleen knows his shit in terms of engineering a fast car. For god's sake- it will do a standing mile in 25.9 seconds, and it will hit 200mph in 23.4 seconds (Road and Track standing mile article), and it will pull 1.04g steady state (Car and Driver). Thats just ridiculous.
Also note- I don't think most Americans are convinced that it is faster than the Koenigsegg in terms of top speed (Saleen didn't build it to challenge the top speed record, if it hits redline in top gear, it would max out at 235), but rather around tracks and in mid range accelleration.
The Koenigsegg and F1 definitely look better though.