Congratulations Welcome to the forum!
I'm a newbie too...not getting married till February 11, 2012...in Riviera Maya, Mexico at the Azul Sensatori. We are using destinationweddings.com and our TA has been AMAZING!!!
If you search on here, you will see that there are mixed reviews about them...it all depends on the TA you have and we lucked out (she was a personal referral through a co-worker who used her for her Costa Rica wedding last week).
Good luck with everything