Well we just learned about them and it appears that they are mini HTML inserts that let people know you have a facebook page. You can use these in your email signature, blog or place them on your website. We suggest placing them on your website over your email signature but whatever floats your boat is fine.
A how-to article lead me to success: http://www.ehow.com/how_2031214_badge-facebook.html
Start your badge creation project from the Facebook home page (see Resources below).
Click on the “My Profile” link to view your current profile after you have logged in.
Select the “Create a Profile Badge” link that can be found on your profile.
Choose a template to help create your badge. A photo badge showcases your most recent photo uploads. The Signature Badge has your contact information and is ideal for email and forum signatures. The blog badge is a great addition to your external Web site or blog.
Finish making changes to your badge and click “Save” to get directions for posting your badge. You will need to copy and paste the provided code into the Web site where you want the badge to appear.
Show your individuality by choosing to “Create a Badge” from the “Create a Profile Badge” page.
Set the basic layout and format.
Add any items from the drop-down menu that you want to include in your badge. Click the “Add Item” button to add it to your badge. You may add more than one item. With no template, you can add anything you want to your badge. It will preview as you make additions.
Hit the “Save” button to complete your badge and get the necessary code to post it.
Thanks again ehow.com!