Absinthe is sold in the states. Its made w/out worm wood. You can make it yourself though. Wormwood sold alone is not illegal either.
Basically, wormwood soaked in a sealed absinth bottle for however long, will create a sort of absinthe you'd get in other countries.
I had czech absinth once. A couple that was friends with my ex smuggled it back. It was yummmmm
Tastes a little like szambucka(sp?) or black licorice