I have heard a rumor that Dodge is working on a variable cam timing and MDS for the 2nd generation 5.7 Hemi. It will also produce more hp (possibly 370 hp), more torque, and better fuel economy. This engine will, supposedly, be in the R/T for 2009 The 6.1 will be in the SRT.
Expect the new 5.7 to launch with the all-new Ram, and expect it to have enough power to embarrass the Tundra. My guess is 400, but we'll see.