Zero

That's the target Fed funds rate (the rate at which banks loan their fed fund balances to each other for short periods) that Bernanke set this morning. The fed wants to keep this rate between 0 and .25 percent to ensure liquidity (making it cheaper to borrow money makes it more profitable to borrow that money and use it for enterprise or purchase of goods).

Blogger, New York Times op-ed columnist, and new Nobel Laurette in economics Paul Krugman observes "we are in very deep trouble. Getting out of this will require a lot of creativity, and maybe some luck too." So that's comforting.

By the way, you may be wondering: what is the difference between the fed funds rate (the rate at which banks loan to each other) and the LIBOR (the rate at which banks lend to each other!)? Explanation here.