With me, both http://www.google.com/search?hl=en&q=hard+disk+encryption and http://www.google.com/search?hl=en&q=harddisk+encryption (with and without space) give LOTS of links (including sponsored ones) that seem quite useful.
If you select a few programs that look promising, you can google again for reviews or other information using the program name, or have a look on the usual download sites like download.com or tucows.
Hope this helps.
I've searched everywhere with a variety of words and can't find any reviews of programs to protect my laptop if it should be lost or stolen. Where do I look? I know that I saw some reviews somewhere last year.
I have a Toshiba Tecra A3-S611 running XP prof, Centrino. I also am running Norton Internet 2007 (but may soon change to Avast, Zone Alarm and Webroot as I have done on my desktop).