Here is some info about speaker one-sheets; if you go only to one link, this is it:

http://www.speakersite.com/profiles/blogs/looking-for-speaking

Lots of samples of one-sheets:

http://www.macgraphics.net/one-sheets-for-speakers.php

REMEMBER: your one-sheet should cover just ONE topic. You can create multiple, near identical one-sheets for all your sessions, but just one per session so you can share specific information. Think of it as a 1-page full page ad for you as a speaker.

Download Felicia’s One Sheet Checklist

And here’s an example One Sheet from one of Felicia’s clients: