WOW, I can't believe he actually sent you this email!!!! Thank you for posting it here. If I were you, I would post it everywhere and possibly even with the Better Business Bureau! Nothing like making sure his "up and coming reputation" is full of truth!
Congratulations! I am also getting married in Punta Cana, we set the date as June 24, 2010 at Paradisus Punta Cana ~ let me know if you need any information, I am still in the beginning stages as well, but am having a blast!