Letter from Osama to Ted Kennedy
 

After numerous rounds of "We don't know if Osama is still alive", Osama himself decided to send Ted Kennedy a letter in his own handwriting to let him know he was still in the game. Kennedy opened the letter and it appeared to contain a single line of coded message:

370HSSV-0773H

Kennedy was baffled, so he e-mailed it to John Kerry. Kerry and his aides had no clue either, so they sent it to the FBI. No one could solve it at the FBI so it went to the CIA, then to the NSA. With no clue as to its meaning, the FBI finally asked Britain's MI-6 for help. Within a minute MI-6 cabled back with this reply: "Tell the FBI that Kennedy's holding the message upside down."

i used to enter that into calculators just for fun... :)