i found this at Mitch Kapor's Weblog:
"Aoccdrnig to rscheearch at an Elingsh uinervtisy, it deosn't mttaer in
waht oredr the ltteers in a wrod are, olny taht the frist and lsat
ltteres are at the rghit pcleas. The rset can be a toatl mses and you
can sitll raed it wouthit a porbelm. Tihs is bcuseae we do not raed
ervey lteter by ilstef, but the wrod as a wlohe."