Flying through Class B MCO shouldnt be a problem. Jax Center or Daytona App will hand you down to Orlando App. They will more than likely vector you around the airspace, I get vector everytime around Sanford, and Lake Apopka for departing traffic out of KMCO after that youll on the clear into LAL (Remember Disney World has a TFR). You'll be fine as long as you request a VFR flight following before you depart Jax (& file VFR flight plan)... Now If you go to Tampa they normally cut you lose whether or not you request flight following and the whole approach into tampa and st. pete is a bit tricky at first.
* The only VFR corridor Ive flown and seen on charts is the Hudson River VFR Corridor ...