from my friend Bassam:

Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae.The rset can be a tatol mses and you can sitll raed it wouthit porbelm.The huamn mnid rdeas the wrod as a wlohe.