Nice simple recipe. Looks very tasty. Leinenkugel Sunset Wheat is a blueberry American wheat a lot like yours. Tasty beer.
Next time, you are probably better off going with some Oregon brand Blueberry Puree as opposed to fresh blueberries.
It is hard to get enough fruit character from fresh fruit unless you use a metric shit-ton (esp. strawberries). The puree is concentrated so it packs a boatload of flavor per unit volume, its sanitary, and it tastes a lot better than the extracts.
http://www.oregonfruit.com/of.pl?pg=whOh, and not to nitpick, but the American Wheat yeasts like WLP320 are different from Bavarian Hefeweizen yeasts in their ester and phenolic profiles, to the point where they are very different style beers. Your base beer is fits more into the American Wheat category than the Hefeweizen category because of this marked difference in the yeast profile. Both are tasty beers, just different. Not blaming you, its a common misnomer propagated by marketing folks at Widmer and Pyramid.
HTH-
Wish I would have found this site earlier. Been brewing for about a year and loving it. Currently have IN BOTTLE: Coffee Oatmeal Stout, Pumpkin Blonde, Blueberry Heff - In Primary: American Wheat - ON Deck: BIG IPA, and an Red. Starting to trying my own recipies now and so far so good. Looking forward to getting as much feedback as possibly for a newer brewer. 
Cheers 
