I'm imagining now a system where users with lots of karma can "invest" in posts they think should be on the front page, incubator style. If they make it to the front page it's an "IPO" of sorts and they get a return on the other users votes.
Because whether a story makes it onto the front page is a total crap shoot. It depends entirely on whether anyone is looking at the new page in the 30-60 minutes immediately after you submit.