Lync 2010 for Windows Phone extends the power of Lync to your mobile device – including rich presence, instant messaging, audio conferencing, and calling features from a single, easy-to-use interface.
To download it for your phone go http://www.windowsphone.com/en-US/apps/9ce93e51-5b35-e011-854c-00237de2db9e
I put it today on my Windows Phone, but our internal Lync deployment isn’t ready yet, I am ready to try it out. I hope other phone clients are coming soon.
Here is a demo on the new Nokia phones: