I'm going in July and hadn't gotten the
free dining PIN that others have. I tried using one of my husband's email addresses and registering him on the WDW site, saving some offers and requesting the DVD. Sure enough about 2 weeks later I got a PIN code saying that "we see you're looking to come in July..."
I started the post "Stay!Play!Dine!" about it.
Anyway you might try that. Perhaps that worked for us - I just got the PIN offer yesterday (March 25th). I have until the end of April to book. IThat makes me wonder if they'll release any general codes before then
Anyway - good luck!