Where are Vista Drivers?

did I ask this before? ... I'm sure I did. Well, we are ending this month of February and we have not seen Vista Drivers officially released for any of the UMPC currently in the market. What I have seen is some of the companies starting to sell their UMPCs with Vista installed. This is the case of Samsung whose Q1p is listed now at CDW to be released in 10 days and the "new" Asus with Vista, spotted for sell in this UK store.