SideBars are a great way to spice up any article--that's why magazines and newspapers use SideBars in their articles all the time. Custom SideBars are a great way to highlight any message inside an article--the place where your readers are already looking. For example, you could add some additional information related to the article, promote a product that has a tie-in to the article, announce an event, or even use it to post your readers' comments about the article. A little creativity here can go a very long way.