Everything you need to remove your Facebook profile and bring it back.
It's recently been claimed that Facebook is using smartphones to listen to conversations and collect data about users.
You can create a custom URL for your Facebook Group -- similar to how you can with Facebook Pages.
If you're the administrator of a Facebook Page for your business (or whatever), you can still comment as yourself.
Your facebook username allows people to quickly access your facebook profile: for example, http://facebook.com/benderisgreat.