Hi Bikegirl,
Glad you are having a pleasant experience as well. Weddings by Oceans has been very great to deal with and their owner has over 25 years of extensive experience in the travel industry. They dont just claim to have the expertise, they can prove it. They are having a "Brides Bash" on May 29. Contact them for more details if you want to join.
We are getting married in June 2011 at Barcelo Los Cabos in Cabo. I just booked, so just over a year in advance. I would recommend doing at least a year especially with popular resorts- I heard that a few in the mayan are already sold out for weddings in 2011. We also want to give our guests enough notice. What resorts are you looking into?