I could not log on to Skype. I found the following announcement.
Status announcements
Problems signing in to Skype By Peter Parkes on June 7, 2011.
Update 2:
We are continuing to address today’s problems, and are seeing indications that the situation is improving.
If you were disconnected from Skype earlier, you shouldn’t need to manually sign back in to Skype - it should reconnect automatically when it’s able to do so.