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I've check the prizes he claimed, though, and one was a PS game and the other a DC one. Looking at his winning entries indicates that he probably has both consoles (his DC prize was won for a review of Vagrant Story). Maybe the winner was chosen randomly on the second occasion (as it apparently sometimes is). Whatever the reason, it does show that you CAN win more than once.
There may be more double-winners - I just happened to see this name twice. Triple-winners anyone?
By the way (just to annoy you even more) the first message I ever posted on these message boards won me a game!