I cant remember what our power bill is...mainly because we are usually behind and have two months we need to pay or something, lol.
As far as the dishwasher, I think the heated dry is just a time saver...in theory. If the hot water is hot enough, the dishes should be fairly dry within a minute or two of openign the washer door. The extreme heat will sort of zap off the water. Thats how we do it anyways...I just open the door to let the steam out, and the dishes are mostly dry...if not, they are hot enough so that they will dry out in a few minutes up in tthe cupboard.
When we do laundry, I always use cold water...never have been able to tell the difference. I think hot is good for sanitary stuff, like blood or cat pee...etc. Damned cats.
Lots of dryers now have the air dry option where the heating element doesnt turn on. Not sure how much power that would save, but its another option.
As far as showers, you could, if you dont already, get one of those water saving shower heads. the shower head we have is the one that was already in the shower when we moved in, and its fairly nice. Has a wand, plus another showerhead that stays in place when the wand is removed...sort of like two shower heads in one. When I wake up to take a shower first, I jsut turn the wand off and the other shower ehad hardly uses much water at all.
If we ever buy a house or build one...Id like to get one of those tankless water heater systems. The water tanks are such a huge waste of money.
We use CFL's too. In our trailer, wed replace the regular bulb with a CFL...and I think most of them are CFLs now in there. In our apartment here, we have gone el cheapo and just replaced the bulbs with regular bulbs again. of course, on average, we seem to burn a bulb once a week at least. Right now we are replacing the bulbs with CFL's in lighting that we use most often...kitchen, living room...etc.