You can share Headlines from the Media Mob View in multiple ways.
Tapping on the Sharing button in the title bar (right) will display the Media Sharing Buttons (Facebook, Twitter, Mail, Safari) .
The Mail Sharing Button will bring up the Mail Composer view.
The Safari Sharing Button will open the Headline web page in Safari. You can then use Safari to bookmark the link. You can return to Media Mob by double-clicking the iPhone home button an then selecting the Media Mob icon.
Tapping the Facebook Post Button will automatically check to see if you have registed your Facebook account via iPhone Settings. If so, Media Mob to post the Headline to your Facebook page.
Tapping the Tweet Send Button will automatically check to see if you have registed your Twitter account via iPhone Settings. If so, Media Mob to post the Headline to your Twitter timeline.