To briefly answer this question the idea of slavery can include forced indentured servitude such as that endured by illegal immigrants who are forced to take sweat jobs by their coyotes (and whatever you call the guys who bring girls over from China to work in "happy ending spas").
These people get here thinking they will be coming to a job that will get them citizenship etc, and owing thousands to the people that brought them and they have to work it off....and it ain't like they can safely quit.
There are cases where Filipina women who were sent to Saudi and other places to work as maids and servants are brought here and treated as slaves by their "employers".
Slavery in its purest form still exists in some places such as Mali and the Sudan where there are actually slave auctions in little dust pits off the salt road.
HBO recently did a story on Real Sports about a ring of camel jockey training camps where small children were purchased from Bangladesh and other 3rd world nations to serve as jockeys in the Sultans camel races in the UAE and Saudi. The story was pretty horrific, as the masters in the camps used these small boys in vile and despicable ways. The very rich camel owners, who build swimming pools and airconditioned stables for their camels actually allow these boys to be kept by the "trainers" in squalid camps with no sanitation and no real medical care. They either turn a blind eye to it or they lie, deny and counteraccuse....typical reactions for this part of the world when uncivilized and medieval habits are brought up to scrutiny by the rest of the world.
Heres a link to the story where one of the owners, who was also one of the biggest horseflesh purchasers in Kentucky, was indicted.
[Edited 2005-03-27 19:20:45]