xCake Ads Lite allows you to add banners to your sidebar via a widget. Still in beta-testing mode (expect daily updates)
xCake Ads Lite is a simple plugin that allows you to ad any type of banners to your widget-friendly theme. Just install and configure it!
Please be aware that this is a beta version, so bugs are expected. If you find any, please report them to canha at xcakeblogs.com.br with a detailed report of what you tried doing and what was the error. Beta testers will be credited on official release.