Who is the blonde-haired, Australian female that is in at least two of
Kevin Trudeau's infomercials? She has been in the "Mega Memory"
infomercial as well as another dealing with oxygen and magnesium. I am
only looking for her name. Mr. Trudeau’s Web site is at
http://www.trudeau.com, but I cannot find any information about the
cast in his infomercials to find the girl's name.

I was unable to find anything about her other than a *possible* first
name.  A "Samantha" is mentioned here:
http://groups.google.com/groups?q=%22mega+memory%22+mega+memory+samantha&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=3A5E5767.316C1C9F%40ihug.co.nz&rnum=1

Maybe another researcher will have better luck!

The "Mega Memory" Infomercials may have been partly produced by
Tru-Vantage International Inc. Contact information is at:

http://www.infomercialscams.com/information.htm

They have an 800 number so perhaps you could call them.