2011 Challengers is already announced. SRT8 has announced the new 6.4L engine. They flipped the lower grill opening upside down. All new V6 with 300+hp on the SE. Other updates and price increases across the line. Given the recent turmoil at Chrysler, it is hard to predict beyond 2011. Fiat hasn't said anything about killing it though, so I'm hoping for the best.
Definitely a lower volume/higher price strategy. Maybe with an up to date V6 the SE will be a higher volume car.