I had the same problem for the date. I initially emailed Rocio in April 2010 wanting to reserve our wedding date for the end of March 2011 and I had to wait a few weeks since they didn't have the new calendar. Don't worry... they usually allow up to 3 weddings a day. You should be able to get the date you want.
I agree with EllaBaja1983, they are pretty strict on the 3-day rule. We are arriving on Saturday and getting married on the Thursday (althought we initially planned to arrive on the Sunday, you have to be there for 3 business days prior to the wedding). We are doing the legal ceremony since we didn't want to get married here before leaving.