Just in case anyone else is ever looking for this info, I thought I'd share the latest/greatest.
Once you sign up, you get a screen that acknowledges your registration and says if you purchased any digital items, go to the "My Digital Library" link on the homepage.
If you are like me, from this statement you would expect to access the silver certification test from this link. So you will go to the home page and this link will not be there. Then you will probably think some unkind thoughts. LOL.
But eventually you will get four emails. One of them will have the link to the silver certification test.