Also, nightshades are implicated in inflammatory disorders like rheumatoid arthritis, and also some skin conditions. If you have no special challenges and/or haven't noticed any sensitivities to them, eat happily away.
And - just because you are new here, I do need to caution you to read the book and stick to the book, regardless of what anyone else here writes. Some of the folks on the MDA really do have serious complicating medical conditions, but the rest are mostly just putzing around with the Primal for whatever reason. After a while you will know your own body well enough to tweak your foods into a form optimal for you, but until then - as always - stick to the book. Welcome here!
And blueberries are my one of my favorite fruits. Especially the wild ones. Yum!
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC