what's a good technique for freezing blueberries? I'm taking a trip to the berry patch today. I'd like to get say 3 pounds of blueberries and freeze them. The problem is that when you defrost them, they're all busted up and mushy. So I wonder if I could put them in the oven at 150 for an hour or so and dry them out a bit before I freeze them. 

Would that pull some of the water out and result in less exploded berries when the water in them freezes? What's the best way to freeze a blueberry? 

Edit: years later, bought a food dehydrator. Gotta say, a dehydrated blueberry is much tastier than a previously frozen blueberry. Easier to store (use desiccant packs) and you can mix them in with trail mix too. Maybe not great for baking but heck maybe you can re-hydrate them overnight with some water.
Lay them out on a tray in a single layer and freeze them flat first. Once they're frozen, pour the frozen berries into a freezer bag and store them that way. This has worked well for me.