Yep, your dealer will send the info to DNA for your warranty - some do it electronically and others do it via fax or snail mail.
For my 749, I bought it in May 2007 and got the roadside assistance card (I'm assuming this is the card you're referring to) about 2 months later.
For my 1098, I bought it in the beginning of October and haven't gotten anything from DNA, yet.