I highly doubt it. sounds like the entire '08 motor is going to be very, very, very different.
but i hope so!
Vipermann,
If you look at the above thread "What's UP? Dodge didn't show it today!" there's a post with a link that gives a lot of info about the 2008 and the engine is completely different including the heads which are much improved - bigger valves and over 10 to 1 compression.