title: What size images should I use in order to support the two iphone resolutions?
body: <p>I have a few questions about screen resolution, that I'm not clear on.  These questions assume they my app will be running on iOS 4.0 and up, and on either iPhone 3GS or iPhone 4.</p>
  
  <ol>
  <li><p>Should the size of the splash image (default.png) be (960x640) or (480x320)?</p></li>
  <li><p>Should the size of the app icon (Icon.png) be (57x57) or (114x114)?</p></li>
  <li><p>What about other graphics that I may use in my app, such a graphic that represents a button?  Should I always create these images for the higher resolution, and have the app scale them down?  In other words, if I want a button image to be displayed on the 3GS that is 200x40 - should I create the image at 400x80, so that iPhone 4 can take advantage of it?</p></li>
  </ol>
  
  <p>Thanks!</p>