What would be fun to utilize with facebook friends?

Most people are familiar with form spring - a site that allows people to anonymously ask questions to be answered. Which of the following do you think would be fun as well?

1. Cork Board - When you visit the site, it lets you log in with your facebook information and lets you make posts of either text or picture. All of your FACEBOOK friends, if they visit the site, will be able to see it. So when you visit it you'll see your posts along with anyone else you have added, but they will be anonymous. You can also make comments on posts and stuff like that.

2. Polling Station - Similar to form spring but rather than letting other people ask questions - they answer yours, anonymously.

3. None - those are dumb ideas.

4. Other? xD

I like the polling station idea...can you tell me where all of these sites are...if they exist? Or are you asking this because you plan to create these sites?

I like things like these ;D