Random CSS Tip #2 - Hiding Text for Google
Have a fancy header image you are using on your page? Rather than just using an img tag to display it, display it as a CSS background to your header tag (<h1>, <h2> ...). This will allow you to still set regular text for search engines to crawl through. Just be sure to set the font-size to 0 and also text-indent to something large like -2000em to satisfy silly Internet Explorer.
This will help you with your search engine optimization (SEO as the cool cats call it), is more semantically correct than using an img tag, and most importantly is great for users who use text readers! Look at that again satsifying sematics and creating a better user experience!
