I want out of here. Non-newbie cred: I posted a couple of times in Reddit explaining in layman's terms how the blockchain works:

http://www.reddit.com/r/explainlikeimfive/comments/jmp7u/explainlikeimfive_how_the_bitcoin_block_chain/
http://www.reddit.com/r/explainlikeimfive/comments/jqnex/ely5_how_the_bitcoin_block_chain_works_part_2/