Like RML, I also don't use any of the new features besides pixel mapping and 1600 noise reduction. I don't use the review LCD any more than before (and that is- hardly) and I do only when I want to chekc the histogram, whcih I generally don't. I guess it would be nice if members here (furcafe and others) would not make assumptions about other's use, as if we are discussing the games of 5 years old kids with a new toys. Most of us are unlikely to "use new features" just for the fun of it- we use the R-D1 to take picutres, and at least I use it as close as possible to the way I was always using my Leica cameras, that is, using it like a manual camera and not like a computerized toy. I think such assumptions disturb the possibility of a serious discussion.
BTW, as far as I remember, few years ago one of canon's cameras (10D, 20D don't remember exactly) got a firmware upgrade which reduced battery life significantly, and after a while it was corrected by a new firmware which solved that problem. Now who is the next one to scream No Free Meal? It is not trivial at all that a firmaware upgrade would lead to change in battery life. Very often, in fact, firmware upgrade contains a better power management which increases battery life significantly. (had that with my Kodak slr/C as well as with my Treo Palm...)