Vista versions

i guess most of you already kno tht windows vista, the next edition of windows os is releasing sometime next year.... there are quite a few "editions" of vista available on the market...guess its jst a way to fleece every1...i guess ther r around 5 or 6 versions tht will b available..came across this article which describes the various versions and the differences. might b a gud read for those of you who've been wondering wht's with the versions....