A public beta of Microsoft Messenger for Mac version 8 (build #08.00.00.100305) was released a few days ago.
This new version is for personal accounts only. To sign into your personal account you will need an ID on the Windows Live Network. The ID can be from any e-mail account ending in "@live.com", "@hotmail.com", "@msn.com", or other account that is registered with Windows Live. Users with an account on a corporate network that uses Office Communications Server will not be able to use this beta.
The Messenger for Mac 8 Beta introduces the much anticipated audio/video feature. You can now use your personal account for face-to-face interactions with family, friends, and coworkers by using Messenger for Mac or Windows Live Messenger.
Download Microsoft Messenger for Mac version 8 Beta