Lync client for Android is On Android Market NOW!
Lync 2010 for Android 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.
You can download the client from Android market here (https://market.android.com/details?id=com.microsoft.office.lync)
IMPORTANT: Microsoft Lync 2010 for Android requires a Lync Server or Office365/Lync Online account and will not work without it. If you are unsure about your account status, please contact your IT department