Microsoft’s Hotmail team today announced that the Facebook Chat integration in Hotmail rolls out worldwide. Last year, Microsoft started their integration with Facebook which allows Hotmail, Messenger users to connect their accounts with their Facebook accounts. After the connection, the users can chat with their Facebook friends as a normal messenger friend inside both Windows Live Messenger and Hotmail. It works handy to connect with your Facebook friends when your workplace/academic institution has blocked Facebook but have access to Hotmail.
More details here.