Chris Lema is a terrific presenter. I would recommend him highly for a WordPress presentation. I'm sure he has other areas of expertise to present on as well - such as how to do a presentation. Chris has some nice tips on his website: http://chrislema.com

With this slide Chris gives a wise warning about using GoDaddy as a server host.

Find Chris on Twitter @ChrisLema

If you have not yet secured your WordPress.Org site, you should.