Depends on what you are looking for. Facebook provides a variety of applications for usage.
For Socializing, Facebook has:
~Messaging
~Instant Messaging/Chatting
~Pages
For Entertainment, Facebook has applications such as:
~Dream World
~Galaxy Legion
~Mafia Wars
~Mob Wars
~Restaurant City
For Media, Facebook provides the ability to post:
~Videos
~Photos
You earn facebook credits by playing lots of games and apps on facebook.
Facebook automatically sends invitations to people's friends. You can disable the apps in the Facebook settings and then you will not receive them.
To authorize apps on ones Facebook account, simply select the settings tab, found under the my account icon. Then select the my apps link and there one can add, delete and manage apps.
Games that you play on Facebook.
No, only the apps do
No but some features in apps require Facebook credits which you can purchase from your credit card or from a Facebook credit gift card that you can find at any local technology supply store.
There are some apps on apple devices that allow u to get on Facebook
The only place i know to get apps for the ipod is iTunes and that cost's money
You delete your account
The Facebook app or other apps that allow you to upload photos to Facebook
block it from your facebook wall
You can install apps to access Facebook. A browser app would let you access facebook through a browser window much like you do on computers. There are also free apps that let you stream information from Facebook to your mobile phone.