A big no no in site design is using images to convey a text message. It takes more time for your site to load, it has little to no seo value, and is difficult to change style compared to editing a CSS file. There are usability issues as well.
You can break this rule though, when the text absolutely requires special handling like in a logo. The site Orlando Visiting is a blog about Disney World, and Orlando. Looking at their logo, you will see an obvious good reason to break the rule, and go with the image. Imagine this blog with just “Orlando Visiting” in regular text. Yuck, boring. Another really positive use of this image besides the text message, is that it clearly indicates to a new visitor that they are on a site about Disney because of the font they chose to use. Now that is how you make an image talk, and make it vital to the site.
