Westinghouse did screw Tesla, but he wasn't the first, not the last.
Here is a good site on Nikola Tesla: Forgotten American Scientist
Found that site a few year's back. One teacher's fight to keep the memory of Tesla alive!
Yep. In fact, the Supreme Court ruled in the 1940's that Tesla in fact was the true inventor of the radio. Tesla's patent was before Marconi's - but Marconi (who was rich and politically connected) had gotten the patent office to recognize his patent over Tesla's. Marconi essentially stole the patent and made a killing on Tesla's pioneering work.
It was too bad all the recognition was after Tesla's death. He was a real genius - a true engineer. Our use of electricity and wireless transmission (including LF and ULF to talk to submarines!) would not be the same were it not for him.