Cast your bread upon the waters
for more info, this guy has a lot more to say on the subject, http://www.pinenet.com/~rooster/v-salute.html
Um, Shin as your picture shows has three uprights. This is a letter that remains pretty much unchanged since the paleo-Phonecian script was invented. (Though it does look different in modern cursive that is still nothing like a vulcan salute.) Who is kidding whom?
yup, and the vulcan salute has three uprights, the two sets of two fingers and the thumb. not only that but the right handed vulcan salute imitates the spacing of the uprights of the Shin, where the left and middle uprights emerge close together from the stem. i think as innessential trivia goes the word of Nimoy is enough for me, and the word of a trekky Rabbi, see link in comment above, surely icing on the cake? :-)
I'm a skeptic, see: http://www.chabad.org/library/article_cdo/aid/894569/jewish/The-Priestly-Blessing.htm I still wonder who is kidding whom and why?
oh well, if you don't trust Leonard Nimoy there is no helping you! ;-)