“FACEBOOK BOMB” ? ON JAN 15 2013

 Facebook has circulated a rather mysterious invite amongst the media fraternity asking all to join the
 social network at its headquarters in Menlo Park, CA on Tuesday January 15 at 10 a.m. PT with a
 simple yet perplexing message: “Come and see what we’re building".

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 The invitation is in the midst of the current CES, suddenly has attracted attention because of the
 curiosity element leaving little to guess. It says simply: "Come see what we are building."

 After Facebook announced the 15 Jan event items are running wild, ranging from launching  a
 smartphone close forever!
 Some of the rumors  include:

•     Facebook will launch a smartphone, says IBNLive.
•     Facebook will shut down forever on Jan. 15, says,  The Weekly World News.
•     The event will last “hours,”, Mashable believes

P.S. - Any educated guesses on the "what" can be tossed in comments below.