This is a cool mac app I just downloaded. The application is called Comic Life and allows you to easily create comics using your pictures and text. Its VERY EASY to use and has numerous options for a variety of layouts and balloons. I was easily able to create a stupid but really cool looking comic in like less then a minute since it automatically loaded up my iPhoto pictures automatically in the sidebar and allowed me to just drag and drop images into the layout. You can download it and try it and its only 4MB. [Link]