This site lists the quarter mile time of a 2000 Audi A8 as 14.2 seconds. That is pretty damn fast but surely is not accurate. It lists the A8 LWB as 14.3 seconds to further compound the typo. It is a fast car for a sedan but surely not this fast. I have not been to the track so I can't argue this number with any data but I feel it to be a mistake by at least 1.5 seconds.

Also, I was curious. All this talk about the S8 coming to the US got me to wondering how much this car would even cost. Any of you care to estimate what the base price of a 2001 S8 might be in the states? Is this car $5,000-$10,000-$20,000-$30,000 more than an A8?

The current price differential between a base S8 and A8 4.2 in Germany is Dm 21,200 or about US S10,800 at current rates. This includes German taxes. Here in Switzerland the difference is closer to US $12,000. I wouldn't want to project a North American price, but it is difficult to imagine Audi of North America would ask more than a US $10,000 premium.
In regards to acceleration, there's not much call for quarter mile times over here.

Wonder if there will be the knid of negotiating room there is on the A8.

Well don't give up hope. The A8 is a limited production car and they deal on it. I assume it's because it has a higher margin as well as a higher cost to keep on the lot and if they can find some one who can pony up the money, the dealers are probably a little more eager to get a car with those selling factors off the lot than an S4. Preferences, image, demographics, etc. aside, the S8 at $75,000 is going to have a smaller market segment than the S4 at $45,000 purely based on cost of ownership. Add in the other factors and the segment gets even smaller. Dealers know there are many more people out there that can afford to pay full price (and therefore will) for an S4 than for an A8 or S8, so a dealer will be much less willing to negotiate on the S4. Of course ultimately what always determins the price is demand and the demand for A8's isn't to the point that the dealers are not willing to negotiate. Because of it's price, the same will probably hold true for the S8 IMHO. Of course I could be compleltly wrong and the S8 may sell above sticker.