301 old non-sef urls to new ones?

I read somewhere that SEFadvance will 301 old, non-SEO-friendly URLs to the new ones automatically.  Example:

user comes in on domain.com/index.php?option=com_content&task=view&id=4&Itemid=9 , the URL is 301 redirected to the new SEO friendly url, which would eliminate duplicate content indexing at the search engines.

Am I correct about the 301 redirect?  am I doing something wrong?

My site will give a 200 OK to the same content item, whether it's requested via the old url string, or the new SEF url string.

thanks for the help

No, it will redirect OLD SEF links to NEW SEF links.
For example:
domain.com/option,com_content/task,view/id,4/Itemid,9/
will be redirected to
domain.com/section/category/article/

Accessing non-sef URLs will not be affected.

ah, I see.  Any way to rewrite the non SEF urls too?  I notice googlebots crawling them a lot.

Not by SEF Advance.
You could put some custom code in index.php to do it but that's outside the scope of SEF Advance support.

indeed.  perhaps this thread would be better suited in the 'custom coding jobs' category?  would this be something you would be interested in doing?

Sure: www.sakic.net/support/services/