Turns out, Bill Gates started using Facebook (again) and also just started using his Twitter account, which was created half-year ago. My guess is he’ll stop using them both soon, OR will assign a secretary or PR person to handle it. These services might be good for him to encourage people to do more charity, but it certainly doesn’t require his personal involvement.
I don’t see any value in Twitter, and only limited value in Facebook (unless you are a student). It might be fun, but it also distracts you from real life. This endless stream of status updates and messages is just resembling spam. Any sane person avoids spam.