PS tip-An MC's primary role is that of service and support. An introduction is meant to set the scene and give the audience a taste of whats to come. It is not a vehicle to showcase ones clever, witty remarks. If you want to spice up a rather serious introduction, a safe bet is to ask the speaker for something unique or humourous you can use.
For more information on how to write an introduction: http://emcee.com.au/pdfs/Camille%20article.pdf