Recently I did a quick talk in a company to present the Microsoft direction on RIA, that means Silverlight.
Here are my ppt just in case someone needs to present to a non dev team:
A light recap of RIA, a quick overview of Silverlight, and how this fits with ASP.NET and AJAX (that was a 20 min talk).
It is available both in english and french:
Feel free to take it/modify/reuse as you like!