What is the PopSci Predictions Exchange?

It's The Hollywood Stock Exchange for science and technology.

You get $250,000 in virtual PopSci dollars. Then you can expand your portfolio with bets on energy, space, consumer technology and extreme science, and compete against other players for prizes and bragging rights (So far I'm up $20,994).

So far here's my portfolio:

Overall Rank: 369 of 2465 (percentile: 85%)

• iPhone Hack in First Two Months (IPHACK) 5.36%
  • Will the iPhone be hacked to run third-party applications within two months of its U.S. release?
  • If nothing else it'll run DOOM. It's already on almost the entire Apple iPod line. I've made 5.36% on this one so far.
    
• PlayStation 3 Wins Console Wars (PS3WINS) 12.36%
  • Will the PlayStation 3 outsell both the Xbox 360 and the Nintendo Wii by the end of 2009?
  • I can't see the Playstation 3 making this kind of come back. So I'm shorting selling this one. I'll make money if the price goes down, which it will , -12.36% already.
    
• Skydiving Altitude Record Broken (SKYDV) 9.55%
  • Will a human successfully break the world record for skydiving of 102,800 feet by the end of 2009?
  • So let's see. There is a world record of 102,800 feet. Alright well then someone can do 102,801. Easy money.
    
• Major U.S. Hurricane in 2007 (HURICAN) 13.87%
  • Will a Category 3, 4 or 5 hurricane make landfall within the U.S. this year?
  • Weather seems a little volatile lately, and fairly good odds to me on this one. 13.87% and counting.
    
• Google Overtakes Yahoo (GOOGL) 17.07%
  • Will Google.com overtake Yahoo.com as the world's most trafficked Web site by the end of 2007?
  • To me Yahoo seems more like a portal site to me than Google, but I couldn't resist the easy profit due to market popularity. This one might max out the way it is going.