Suggestion - You might look into creating some templates pre-sized to be ready to upload to the appropriate app store(s). Something like http://android-ui-utils

Suggestion - You might look into creating some templates pre-sized to be ready to upload to the appropriate app store(s). Something like http://android-ui-utils.googlecode.com/hg/asset-studio http://android-ui-utils.googlecode.com/hg/asset-studio but for promotional graphics.