Via KurzweilAI.net — Oh my, indeed.
Dark, dangerous asteroids found lurking near Earth New Scientist Space, Mar. 5, 2010 NASA‘s WISE mission has spotted 16 formerly hidden near-Earth objects with orbits close to Earth‘s.
WISE is expected to discover as many as 1000 near-Earth objects, but astronomers estimate that the number of unknown objects with masses great enough to cause ground damage in an impact runs into the tens of thousands.
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David Kirkpatrick 
And – in the next breath – NASA (speaking of “2012”) – tells us not to worry; that nothing like a rogue planet could possibly be approaching Earth (out of a background of 400 Billion stars in the Milky Way Galaxy) without NASA having seen it by now…..
Comment by The Wiseman — March 8, 2010 @ 3:23 pm