Quick check on da wiki looks like it is a mimosoid and has some other interesting properties:
Excellent source of high-protein cattle fodder
Leucaena leucocephala has been considered for biomass production, as its reported yield of foliage corresponds to a dried mass of 2000–20000 kg/ha/year, and that of wood 30–40 m³/ha/year, with up to twice those amounts in favorable climates. It is also efficient in nitrogen fixation, at more than 500 kg/ha/year. It has a very fast growth rate, young trees reach a height of more than 20 ft in two to three years.
The wiki does have it as highly invasive, although it isn't on the Florida list from what I saw. Also The seeds contain mimosine, an amino acid known to be toxic to nonruminant vertebrates.