Out since late May of this year, Citrix XenApp Power and Capacity Management Technology is currently available as a tech preview here. iForum 2009 in Melbourne just finished and they demonstrated this technology in the closing keynote. The use of this technology can really make a difference in your bottom line in terms of power and cooling savings. It is a rethinking of XenApp’s mature load balancing technology and is another way of looking at server utilization (which was much of the argument for moving towards server virtualization a few years ago). This product, combined with Provisioning Server, is perfect for the environment I manage. Our farm is over-built in anticipation of an event that would force most employees to telework, so our servers are typically underutilized. Check out the video below.
Thanks,
Alain
Wag the Real 
Is this technology a license based or do we need to buy this technology additionally as it is not available
Ankit,
Power and Capacity is available as an option with XenApp6+. Here is the Citrix edocs page: http://support.citrix.com/proddocs/topic/xenapp65-admin/ps-pcm-wrapper.html
Thanks for reading,
Alain