Paul Butzi's made a great comment on the new cameras from Canon and Nikon. It's all about photography, not the equipment. I agree - the best camera is the one that puts the least effort between me and the final image. Sometimes that means bells & whistles, sometimes simplicity.
Obviously, I've taken a look at the news from both makers. Feature packed SLRs add some convenience for certain jobs: sports, expose right, low light (ISO performance) etc. For me, the 40D might represent a worthwhile improvement over my 20D. I'm not even contemplating the pro-level gear.
For a lot of work, I like my manual cameras: no fripperies to get in the way - judge exposure, compose, set A & T, fire. I've found myself with the 20D too often checking all the right buttons are pushed & options selected when I'd rather be pressing the trigger. The new custom settings might well help: pre-program & away I go.
Not a single mention of MLU operation in anything I've read: clearly no one does fine landscape work these days. Of course it's there but how easy?
For me the Canon G9 is the most interesting announcement - only camera amongst the news that has potential to increase the amount of photography I do (i.e. it's a pocket camera I might actually like to own). I'd actually like to get my hands on one to try but I bet it's the last of the latest Canikon cameras to hit the shops.