Facebook appeased critics this week when it announced plans at its F8 developer conference to promote applications that are more productive and useful. CEO Mark Zuckerberg also used the event to alleviate increasing privacy concerns by assuring attendees that upcoming features will limit how much user information will be shared. "We have paid a lot of attention to making sure that… people have a lot of control," said Zuckerberg during his keynote. "We learned from last time." The last time likely referring ...