I saw this great post over at nojitter.com. It was about how to implement UC successfully in a business. See the conclusion below

To sum up, in order to motivate end users to use their UC capabilities, begin the process with a sponsorship team and head cheerleader, get your CXOs to set an example, get users throughout the organization excited about UC, and provide the training necessary to encourage proper usage of the solution

View the entire blog, http://www.nojitter.com/blog/archives/2009/05/motivating_uc_u.html

I saw this great keynote from Avaya at VoiceCon 2008 talking about what UC is for different types of users in an organization. It is something to keep in mind when implementing UC successfully. Check it out, http://link.brightcove.com/services/player/bcpid4661575001?bctid=1915453361