Florida in fact probably has more actual kart tracks than any other state in our great country.
The Orlando kart track is a GREAT! track. A few others – Anderson, OGP, JAX (free), Monticello (long track), and PBIR, all pretty good tracks. No matter where you live in the sunshine state you can be at a track within a hour or so.
I also hear great things about the Homestead track – just because it is a parking lot does not mean it is not a good track. As Bob said the best race of the year is held in a parking lot at the RIO in Las Vegas.