In regards to price remember that there is not a reason for the car to be priced anymore than any of the current LX platform cars. Demand? Sure that's a good reason but remember that DCX has sold about twice the amount of 300s as originally expected and the price has not changed.
Also, unlike the Viper (which is mostly hand built and shares a platform with nothing) the Challenger wont cost anymore to build than a Charger. If you want a good explanation as to why, check out the Challenger thread on Allpar in the news and rumors section. The last 10 pages or so (it's on 27 now) help explain alot.
With that said, i doubt we'll see this car within a year. The date posted on the other board is saying the first one will roll off the line on 3/24/07, but we all know that can change. Hopefully by this date in 2007, we can all have one in our garage.