Just submitted my latest iOS game. Check out the demo video here: FreakOut - Tribute to Breakout (iOS Game)
Anyways, I am updating one of my apps - Particle X to include the SpriteKit support. One thing that I need is to put a background texture to the SKScene background. In a normal UIView, we can simply specify self.view.backgroundColor = [UIColor colorWithPatternImage:yourUIImageHere]; and iOS will repeat that texture throughout the UIView. Which is cool.
But unfortunately there is no such method in SKScene.