I'm with Integrated - I can't imagine Penny spending all of this money to set up listening stations for some signal (Contact-esque) and then not do anything. She told Des (during the jogging steps with Jack scene) that she had a lot of money and with a lot of money you can find anyone. I bet she's looking. They just had to get that annoying Nikki and Paulo off the island for us - kudos on a job well done, producers of Lost.

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`Dear, dear! How queer everything is to-day! And yesterday things went on just as usual. I wonder if I've been changed in the night? Let me think: was I the same when I got up this morning? I almost think I can remember feeling a little different. But if I'm not the same, the next question is, Who in the world am I? Ah, that's the great puzzle!'

-- Alice, from “Alice’s Adventure’s in Wonderland”