You can spread the word about Mendeley at your institution using our Teaching Presentation (feel free to adapt the presentation to your needs). It shows both Mendeley's vision and how to use the features of Mendeley Desktop and Web.
Mendeley Fact Sheet
For a quick overview over Mendeley's features have a look at the Fact Sheet. It describes Mendeley on two pages and is easy to forward.
You can download the Fact Sheet here (5MB).