I have been using CoronaSDK for a while now. I am always on the lookout for tools that will make development faster. Keith Peters just developed and put out a tool that I know without a doubt that I will use. Enter SWFSheet, an AIR application that takes swf files and creates sprite sheets for you from the time line animations that you created in Flash. This is totally awesome. Now I can use my animation skills in Flash to create great png based sprites without too much effort at all.