I think the price of the R2H over at www.microanvika.co.uk is so expensive because it comes with Vista installed, i.e. the price of vista is included in the purchase and is not part of a free upgrade from XP Tablet edition

I've just had this response from Asus support after enquiring about Asus R2H Vista drivers

"Dear Customer,
all vista drivers for all asus notebooks & motherboards will become available by the early march
they are being uploaded to our servers globally as we speak
please bear with us for any inconvenience caused
regards"

note the UK site (http://www.microanvika.co.uk/) listing a Vista R2H inform me they should be in stock this week, and they are coming directly from Asus with Vista on it - this would suggest Asus has already done the vista drivers and fixed the issues in order for the Vista R2H they are shipping to be stable and have full functionality..