[thumbsup] I am pleased to say that all SKUs in the Sahara Slate PC i400 series -- the i412T, i440D and i440T are now shipping with Vista!!
In fact, I just received my new machine yesterday -- a White i440D with outdoor viewable screen running Vista. (This will replace my Sahara i215 Pen as my primary computer). I also installed Office '07, and everything, including Aero Glass, is running flawlessly.