What are Bible Codes?  Bible Codes are hidden messages found in the Torah by skipping equal amounts of letters.  To find a given word, the skip distance is set to 1, and each letter of the text is examined to see if it matches the first letter of the search word. If it does, the second letter is examined until a match is made, or the text is exhausted. If no match is found, the skip distance is increased by one and the process is started anew. This technique was not practical until the invention of the modern computer.

This in itself is not very convincing, as the same thing can be done with any book.  However, when a relevant search word is discovered, it often is surrounded by related relevant words at levels far above chance. 

This is a sample of a Bible Code search technique. Actual Bible codes use the original Biblical text in Hebrew.

In the Bible codes are found several references to 2012, and they center around extinction, comets, and asteroids.

Exodus2006.com contains quite a few Bible Code predictions for 2012 and the years leading up to it.  These codes point to a disastrous strike, "and the blood will be throughout the earth".

Here's what the Bible Code had to say about hurricane 'Katrina':

I will break - this city as one breaks a potters vessel, that cannot be made whole again - And I will make this city an astonishment

And about the London bombings:

London will descend -  They will die -7th of July - Train - Disaster

Also predicted are:

World War in 2006

Aug 3, 2006 - Violent 08/03/06 - Since the blood will profanate the earth - They which are poison and a chief/place of the father God - Prostate Rome

    and

Aug 4, 2006 - You will blow up, cry out! - Day of the sign

    and

Aug 8, 2006 - A fire like a terror - In that day there shall be a great shaking in the Land of Israel

Yellowstone supervolcano eruption in 2009

While the above London code seems to be a direct hit, there are others which predict an event and a date which have failed, like the codes for August, 2006 which implied a nuclear bomb, or some other cataclysmic event in Isreal.  Detractors of the Bible Code point out that significant data can be extracted from any sufficiently large text, like Moby Dick, and mathematically show that finding significant data is very probable.  Of course, that alone does not  prove the Bible Codes are false, but may make the Bible Codes useless as a form of prophecy unless some way is found to distinguish true prophetic codes from the false ones found in any large tome. 

Prophecy without dates or date ranges are essentially useless.  It seems there are very few Bible Code predictions with dates prior to 2006, but quite a few after 2005, so the year 2006 should tell the tale.

There has always been the philosophical arguments about whether the future is fixed and immutable, or whether it is malleable and fluid. It may be that the Bible Codes offer glimpses of possible futures, but ones that can be changed by our actions as individuals and societies. Perhaps these arguments will never be resolved, and it is left to the reader to form his own conclusions.

There are many more codes available, and I encourage you to peruse the Exodus site on your own.