I never knew about those... A friend gave me a pack of the cards a few months ago, I saw they has those embossed cards and some other kind. but I didn't know about these! Pretty cool!
You will only be able to post to the forum if you first create a user profile.
If, however, you already have a user profile, please follow the "Set Preferences" link on the main index page and enter your user name to log in to post.