My suggestions for the Orlando area:
Sean O'Brien's school. Call him up and ask about private lessons, if you can't find the phone number email me and I will give it to you.
The Boarding School, with Shaun Murray and Travis Moye. http://www.theboardingschool.com/
O'Town Watersports, with Glen Fletcher. http://www.otownwatersports.com/
World Wakeboard Center(WWC), run by the Hansens. http://www.worldwakeboardcenter.com/
Check those out.