I'm not sure about blueberries, but I made a lager, with 4# cherries and 1.75# black and red raspberries. It was a big hit at the Memorial Day cookout. Nice fruit flavor, and if anything, the fruitiness was light, and not over powering. This was just under a 5 gal. batch, and yielded 48 - 12oz bottles. It had a beautiful red color, and a nice malty character, after the fruit flavor. I'm definitely going to have to make this one again. everyone liked it, even my Mom, and she's not a big beer drinker, either.
Personally, I would use more fruit than you are currently planning. Provided they are real, unsweetened blueberries. IMO
On Deck - Crabapple Wine
Secondary - Pomegranate Wine, Red Table Wine, Wild Fox Grape Wine, Blueberry Wine, Surly Furious clone
Bulk Aging - Brewtopia Barleywine, Sugar Beet Wine