I just saw a new privacy checkbox in my Facebook account settings:
Allow my public search listing to be indexed by external search engines (ex. Google, Yahoo, MSN)
In about 2 weeks, public profile information (only image and name) will be spiderable. A good idea. Most social networking sites already allow search engines to list their user’s public profile pages. This is a logical next step now that anyone can seach people on Facebook without having to sign up first . More info is available on the Facebook blog.