Hotmail's spent the past few years playing catch up with the competition, but for the most part, it hasn't done anything particularly groundbreaking with its services. Earth shattering might not be the appropriate descriptor for its latest addition, but Hotmail's added a helpful new feature to distinguish plain old spam from the kind that comes form a trusted source. Now, when you get an email from a friend that smells of something sea dwelling -- say a plea for some extra scratch from abroad -- you can select "My friend's been hacked!" from the "Mark as" menu, alerting the powers that be that your fri