Posted by Luigi Melita
Yes, it appears that a third-party software companies are developing Windows Live Messenger Phone for Windows 7. It will therefore develop a Microsoft application to chat through their instant messenger but Miyowa, already the author of several official client for other operating systems.
The application is free of charge but we will have to endure a mini-banner advertising, like the desktop version and probably will in the future as more and more mobile applications. At the opening you can see the first screenshot posted on the official blog.
Windows Live Messenger to WP7 will arrive in November