>> install Unity 4.0(2) in a lab environment
Unity 4.0(3) is available on: http://www.cisco.com/cgi-bin/Software/Tablebuild/tablebuild.pl/4yutni0
>>Is this sufficient or is Unity hardware
To play in the lab, I suppose it won't matter much since you are prob not going to max out the ports and subscribers.
However, if you are going to be using the server for production, please use this as a guide for hardware capabilities
Cisco Unity Supported Platforms List http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheet09186a008009267e.html
>>any Unity training doc(not admin guide) available
You still be familiar with the Unity Installation Guide and Admin Guide. I use the installation guide everytime so that I don't miss anything.
That said, here is a good place to start for Unity training.
http://www.ciscounitytools.com/TOI_Unity401.htm
http://www.ciscounitytools.com/TOI_Unity403.htm
