I love to Demo Lync 2010 all the time. I use it everyday, and love to show people how I use it. When I show it, people want to know where they can get the software to download it.
Here is what you need.
First you will need Windows Server
You may want to look at Datacenter or Enterprise editions to look at Hyper-V
Then to get Lync.
64 bit http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=10400
32 bit http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=5484
It works very well with our Email system
Exchange 2010 SP1:
I think most of these are 180 evaluations.
Are you in the Dallas area? join the UC group http://www.dfwucug.org/Pages/default.aspx
The leaders of this group are also talking at November’s http://dfwitprofessionals.com