INVASIVE SPECIES: Burmese pythons, an invasive species in south Florida, could spread to one third of United States
Irresponsible pet owners that have released Burmese pythons into the Floridian landscape have caused an expensive problem that is certain to spread throughout the United States, and these large snakes can spread even further north into the United States as the climate warms. More here and here
Current areas of the U.S. suitable as Burmese python habitat: 
Projected areas of the U.S. suitable as Burmese python during 2100 based on global warming models:
From the SFGate:
Burmese python facts
Size: They can grow to 250 pounds and stretch over 23 feet.
Popular pets: They’re often released into the wild by irresponsible owners.
Lifestyle: When young, the pythons spend much of their time in trees. In adulthood, their weight makes tree-climbing too difficult.
Food: They survive on small mammals and birds but have been known to eat deer and alligators.
Eggs: They lay up to 100 at a time.
On the Net: New threat to our way of life: giant pythons
Just some information from Okeechobee Florida: On July 30, 2009 a Burmese Python was found near The Okeechobee Veterinary Clinic on Rt. 70 West. A male, 17ft 2in, weight 200 pounds. This is the third large snake I can remember being found in this area.
damn that sucks they are qettinq everywhere like takinq over !!
this is so wronqq i hate these snakes they are killinq our animals at the Everqlades we shouldprtotest aqainst this !