I wonder how long it'll be before all sign-ins with Skye will require a Microsoft account.
Today we’re releasing an update to Skype for Windows Phone 8, version 2.16. Back in September we announced new users signing up to Skype on Skype.com would be registered for a Microsoft account. With a Microsoft account you get additional security, privacy and improved password recovery. And with Skype for Windows Phone 2.16, we’ve brought these benefits to Windows Phone users too.
Starting today, all Windows Phone users signing up to Skype for the first time on their Windows Phone will register with their Microsoft account. This is the email and password you entered when you first set up your Windows Phone – the same account you use for other Microsoft services like OneDrive and Outlook.com. Once you’ve set up your Microsoft account, you’ll use it to sign in to Skype on all your other devices too. Improved Security With New Skype For Windows Phone 8: 2.16 [blogs.skype.com]