add front-end streams blog entry

![weeeee](http://24.media.tumblr.com/1877bcca2cf5df5c129152d2dbbdfbb4/tumblr_mh7gxafAjc1qdlh1io1_400.gif)
to people unfamiliar with streams, it may be very unclear at this point what `name` and `cardNumber` are; i know it's described below, but it may be good to put some inline comments in this, even overcommenting it, so that a reader doesn't get lost along the way.