Ack! I can't believe they are changing Facebook again!

That's right.  "Fan Pages" on Facebook are getting a whole new design starting at the end of March.  This fantastic article from Handmadeology will help you figure out what all of the new stuff means and how to make the most of it: How to Navigate the New Facebook Fan Page Timeline

For example, I didn't know that there are rules about what should be in your new "cover photo":
Cover images must be at least 399 pixels wide and may not contain:

• Price or purchase information, such as “40% off” or “Download it at our website”
• Contact information, such as web address, email, mailing address or other information intended for your Page’s About section
• References to user interface elements, such as Like or Share, or any other Facebook site features
• Calls to action, such as “Get it now” or “Tell your friends”