Saw this on the web, looks pretty sweet. Supposed to launch end of this month I think. Apparently it has multiplayer (gamecenter), retina display support, about a dozen planes, and is free. Check out the attached images
As huge fan of Skies of Glory, this looks really cool, but I HATE freemium games. Personally speaking I'd rather pay a purchase price and just have done with it. iAds really puts me off of a lot of freemiums too - ie Gun Bros!
Looks pretty cool. Still, I'd have loved the game alot more if it had a propper, single player campaign with good cut scenest and story!