The one that was targeted back on Sept 1, in which most of us called the DDesk and begged our way onto the program. It was offered as 10nights/25k points *or* 10 nights/free cert.

I've hit 20 nights since Sept 1 and just got my second cert. It's identical to the ones from earlier this year, even marked "Q3FN" and useable at Cat 7's.