I've been air drying for as long as I can remember. The added benefit is that you can put plastic stuff on teh bottom rack without it metling or warping.
Depending on your water you might find that you need to add some Jet Dry or something along those lines or the dishes will be spotty. A large bottle of Jet Dry lasts me a year or so, a lot less than spending the money on heated dry!
Anne
Putting some vinegar in where you would normally put the jet dry will do the same thing, too.
Today I went to the commissary, which really wasn't planned, but I've had two extra kids home sick

for the past week who normally would eat lunch at school so I only had lunch food for 2 kids instead of 4, so I had to get some more lunch and dinner food, plus milk. My good deal of the day was taco seasoning packets. They're .39 each and I had a coupon for a dollar off 2 so I made .22 buying those.
I probably spent a little more than I would have because I also had to take those extra 2 kids to the store with me

Fortunately I think they'll all be back to school tomorrow, except maybe the kindergartner that goes half day, he still has a fever.
I made a list and planned what I needed using what was already in my cupboards before I left. And it actually balanced out, when I got home a person I had filed a NPB on ebay paid me, plus two items I had ordered online and returned posted to my account today so overall I got $106 back and I had spent $95 at the store.
I resisted buying the kids and I candy bars, I usually get everyone a treat when I go to the store (okay, it's a bribe for them to be good, I admit it), but I told the kids that since this wasn't my regular shopping trip no candy, but that I was still very pleased with their behavior and they were still happy.