It will add a little flavor (tip: toast it in the oven at 350F for a ten minutes or so, until you see a noticeable color change). The issue is that you will be adding starch to your wort. Starch+boiling water = gravy. So your beer will likely have a permanent haze. This is the main reason we recommend mashing flaked grains.
"Chill haze is not a flaw. But if you really hate it, try Clarity Ferm. It works!"
Warrior's Ale II (w/exp 6300 hops)
Quadro (quadrotriticale ale)
Black Bat'Leth Stout
Targ's Blood Nut Brown Ale
Battle Cruiser Blonde Ale
Supersecret sour beer experiment v0.5
Supersecret sour beer experiment v1.0
Supersecret sour beer experiment v1.5