I also got a PIN code in an email from Disney Destinations Monday after logging onto the Disney site and pricing room rates for June. The PIN code was in the bottom right portion of the email, and it looked just like the other info in the email. I was looking for it, though, after reading about others who finally got a PIN after visiting the site.
If you call Disney to ask for quotes, always ask if you have a PIN code associated with your name (You might if you've called, stayed, or been to their website before.)
Oh, as an aside, I also priced a few more possible dates today. I got the same emails from Disney Destinations, WITHOUT any PIN code. Don't know if they already know I have a PIN code, or if it's all just completely random.