Hi everyone! I am also getting married in 2010 - February 26th at Dreams Riviera Cancun. It sounds like everyone is definitely in the same boat I've also had people telling me that there are better prices, etc. I'm not (well, trying not to anyway) stressing about it though...if they make it, that's great, if they don't make it - they're the ones missing out on a great trip!
As far as the TA, we went through a travel agent and he seems to have the best deals as far as I have seen. We didn't have to pay him anything and he contacted the resort and the WC for us.