As you might know, there isn’t a lot of information on how to publish Lync using UAG. The main reason for that in the past was that before SP1, Lync publishing wasn’t fully supported.
That changed after SP1, and you can do some publishing of Lync through the UAG server.
Ben Ari does a good job at showing you how to do this in his blog post at
DEBRA LITTLEJOHN SHINDER
MVP (Enterprise Security)