I'm terrible at naming things. It is supposed to be a homophone for "sift", and it's just odd enough that the domains were super cheap :) I toyed around with adding a phonetic "sift" under the logo on the site, maybe I should revive that effort.
But that takes some time to realize, because there's nothing in the context of the word to suggest the vowel be pronounced short rather than long, and neither is predominant in American English usage.