With the release of Lync Server 2010 a common request is around the mobility offerings. Unless someone points to another authoritative resource from Microsoft I think this page which states that it is our plan but not give any dates is the best message we have currently - http://lync.microsoft.com/en-us/Product/UserInterfaces/Pages/lync-2010-mobile.aspx  

If I hear otherwise I will let you know. 

TomL LyncKid