I see that Maya Island Air is starting air service from BZE and Belize municipal to San Ignacio. Starts Dec. 15 with two flights a day. Assume Tropic will start it, too.
Guess it's flying into the Central Farm airstrip?
As a side note, I'd say this new service will be successful. It's expensive, but a lot of people want to go from the international airport to Cayo and don't want to fool with a bus (getting into Belize City and all), renting a car or using a van service. And of course you can connect from San Pedro.