I've been using Google Optimizer since Nov 2006.

I just posted some great tips and tricks that will help anyone trying to test anything beyond a simple "single page test" and "single page conversion".

http://www.prusak.com/archives/2007-03-29/get-the-most-out-of-google-website-optimizer-tips-tricks/

Hope this helps someone, and feel free to ask any other questions you have.

- Ophir