Yesterday Messenger for Mac 8 came out of beta. It will be available (soon) as part of the Office for Mac 2011 suite, and is also available as a free standalone download.
Messenger for Mac 8 provides real-time collaboration between Mac users and their Messenger friends, whether those friends are using Messenger on a PC, phone, through Hotmail, or on another Mac.
You can use instant messaging, audio, and video calls to communicate with your Messenger contacts by signing in with your Windows Live ID. Windows Live IDs include all e-mail accounts ending in "@live.com", "@hotmail.com", "@msn.com" and other accounts registered with Windows Live.
* Supported Operating Systems:Apple Mac OS X
* Operating System Versions: Mac OS X v10.5.8 or a later version of Mac OS
* Voice: Compatible microphone and speakers, headset with microphone, or equivalent device. Sample devices include: A built-in Apple iSight webcam, an external Apple iSight webcam, or other Mac-compatible audio devices
* Video: Compatible Webcams. Sample devices include: A built-in Apple iSight webcam or an external Apple iSight webcam
Download Messenger for Mac 8